Excerpt from the novel Jurassic Park by Michael Crichton

     Arnold stared in shock.
     One after another, the monitors went black, and then the room lights went out, plunging the control room into darkness and confusion. Everyone started yelling at once. Muldoon opened the blinds and let light in, and Wu brought over the printout.
     “Look at this,” Wu said.

Time     Event                        System Status
---------------------------------------------------------------
5:12:44  Safety 1 Off                Operative
5:12:45  Safety 2 Off                Operative
5:12:46  Safety 3 Off                Operative
5:12:51  Shutdown Command            Shutdown
5:13:48  Startup Command             Shutdown
5:13:55  Safety 1 On                 Shutdown
5:13:57  Safety 2 On                 Shutdown
5:13:59  Safety 3 On                 Shutdown
5:14:08  Startup Command             Startup - Aux Power
5:14:18  Monitor-Main                Operative - Aux Power
5:14:19  Security-Main               Operative - Aux Power
5:14:22  Command-Main                Operative - Aux Power
5:14:24  Laboratory-Main             Operative - Aux Power
5:14:29  TeleCom-VBB                 Operative - Aux Power
5:14:32  Schematic-Main              Operative - Aux Power
5:14:37  View                        Operative - Aux Power
5:14:44  Control Status Chk          Operative - Aux Power
5:14:57  Warning: Fence Status [NB]  Operative - Aux Power
9:11:37  Warning: Aux Fuel (20%)     Operative - Aux Power
9:33:19  Warning: Aux Fuel (10%)     Operative - Aux Power
9:53:19  Warning: Aux Fuel (1%)      Operative - Aux Power
9:53:39  Warning: Aux Fuel (0%)      Shutdown  

     Wu said, “You shut down at five-thirteen this morning, and when you started back up, you started with auxiliary power.”
     “Jesus,” Arnold said. Apparently, main power had not been on since shutdown. When he powered back up, only the auxiliary power came on. Arnold was thinking that as strange, when he suddenly realized that that was normal. That was what was supposed to happen. It made perfect sense: the auxiliary generator fired up first, and it was used to turn on the main generator, because it took a heavy charge to start the main power generator. That was the way the system was designed.
     But Arnold had never before had occasion to turn the main power off. And when the lights and screens came back on in the control room, it never occurred to him that main power hadn’t also been restored.
     But it hadn’t, and all during the time since then, while they were looking for the rex, and doing one thing and another, the park had been running on auxiliary power. And that wasn’t a good idea. In fact, the implications were just beginning to hit him—
     “What does this line mean?” Muldoon said, pointing to the list.

5:14:57  Warning: Fence Status [NB]  Operative - Aux Power  [AV09]

     “It means a system status warning was sent to the monitors in the control room,” Arnold said. “Concerning the fences.”
     “Did you see that warning?”
     Arnold shook his head. “No. I must have been talking to you in the field. Anyway, no, I didn’t see it.”
     “What does it mean, ‘Warning: Fence Status’?”
     “Well, I didn’t know it at the time, but we were running on backup power,” Arnold said. “And backup doesn’t generate enough amperage to power the electrified fences, so they were automatically kept off.”
     Muldoon scowled. “The electrified fences were off?”
     “Yes.”
     “All of them? Since five this morning? For the last five hours?”
     “Yes.”
     “Including the velociraptor fences?”
     Arnold sighed. “Yes.”
     “Jesus Christ,” Muldoon said. “Five hours. Those animals could be out.”
     And then, from somewhere in the distance, they heard a scream. Muldoon began to talk very fast. He went around the room, handing out the portable radios.
     “Mr. Arnold is going to the maintenance shed to turn on main power. Dr. Wu, stay in the control room. You’re the only other one who can work the computers. Mr. Hammond, go back to the lodge. Don’t argue with me. Go now. Lock the gates, and stay behind them until you hear from me. I’ll help Arnold deal with the raptors.” He turned to Genarro. “Like to live dangerously again?”
     “Not really,” Gennaro said. He was very pale.
     “Fine. Then go with the others to the lodge.” Muldoon turned away. “That’s it, everybody. Now move.”
     Hammond whined, “But what are you going to do to my animals?”
     “That’s not really the question, Mr. Hammond,” Muldoon said. “The question is, what are they going to do to us?”
     He went through the door, and hurried down the hall toward his office. Gennaro fell into step alongside him. “Change your mind?” Muldoon growled.
     “You’ll need help,” Gennaro said.
     “I might.” Muldoon went into the room marked ANIMAL SUPERVISOR, picked up the gray shoulder launcher, and unlocked a panel in the wall behind the desk. There were six cylinders and six canisters.
     “The thing about these damn dinos,” Muldoon said, “is that they have distributed nervous systems. They don’t die fast, even with a direct hit to the brain. And they’re built solidly; thick ribs make a shot to the heart dicey, and they’re difficult to cripple in the legs or hindquarters. Slow bleeders, slow to die.” He was opening the cylinders one after another and dropping in the canisters. He tossed a thick webbed belt to Gennaro. “Put that on.”
     Genarro tightened the belt, and Muldoon passed him the shells. “About all we can hope to do is blow them apart. Unfortunately we’ve only got six shells here. There’s eight raptors in that fenced compound. Let’s go. Stay close. You have the shells.”
     Muldoon went out and ran along the hallway, looking down over the balcony to the path leading toward the maintenance shed. Gennaro was puffing alongside him. They got to the ground floor and went out through the glass doors, and Muldoon stopped.
     Arnold was standing with his back to the maintenance shed. Three raptors approached him. Arnold had picked up a stick, and was waving it at them, shouting. The raptors fanned out as they came closer, one staying in the center, the other two moving to each side. Coordinated. Smooth. Gennaro shivered.
     Pack behavior.
     Muldoon was already crouching, setting the launcher on his shoulder. “Load,” he said. Gennaro slipped the shell in the back of the launcher. There was an electric sizzle. Nothing happened. “Christ, you’ve got it in backward,” Muldoon said, tilting the barrel so the shell fell into Gennaro’s hands. Gennaro loaded it again. The raptors were snarling at Arnold when the animal on the left simply exploded, the upper part of the torso flying into the air, blood spattering like a burst tomato on the walls of the building. The lower torso collapsed on the ground, the legs kicking in the air, the tail flopping.
     “That’ll wake ’em up,” Muldoon said.
     Arnold ran for the door of the maintenance shed. The velociraptors turned, and started toward Muldoon and Gennaro. They fanned out as they came closer. In the distance, somewhere near the lodge, he heard screams.
     Gennaro said, “This could be a disaster.”
     “Load,” Muldoon said.