vs detonator

I let him, seizing his arm with both hands now, squeezing, trying to choke off the blood to his hand, to weaken it so I could take the detonator from him. His left fist slammed into my temple, my mouth, and my neck. I bent my head down and bit savagely at his wrist, eliciting a scream of pain from him. I slammed my weight against him, slipping some fingers into his grasp, and got one of them over the pressure trigger. Then I wrenched with my whole body, twisting my shoulders and hips for leverage, and ripped the detonator away from him.
He rolled away from me instantly and seized the bag; then he was up and running for a doorway leading down into the building.
I let him go and rushed over to Alicia. The dark-haired girl was trembling uncontrollably.
Detcord is basically a long rubber tube filled with explosive compound. It’s a little thicker than a pencil, flexible, and generally set off by an electrical charge. Wrap detcord around a concrete column and set it off, and the explosion will cut through it like a piece of dry bamboo. Alicia was tied to the chair with it. If it went off, it would cut her to pieces.
The detonator was a simple setup—a black plastic box hooked to a twelve-volt battery, which was in turn connected to a wire leading to the detcord. A green light on the detonator glowed cheerily. It matched a cheery green light on the dead-man switch transmitter in my hand. If what Douglas had said was accurate and the light went out, things wouldn’t be nearly so cheery.
If I let go of the switch, it would stop the signal to the detonator, which would then complete the circuit, send current to the detcord, and boom. In theory, I should be able to cut the wire leading from the battery and render it harmless—as long as Douglas hadn’t rigged the device to detonate if that happened.
I didn’t have much time. The electronics of the transmitter wouldn’t last long around me, even though I hadn’t used any magic around them. I had to get the girl out now.
I made the call based upon what I knew about Father Douglas. He seemed like he might have good intentions, despite all his shenanigans. So I gambled that he wouldn’t want the girl to die by any means other than a conscious decision from someone—either him letting go of the trigger or me blowing the transmitter by using magic.
I took out my pocket knife, opened it with my teeth, and slashed at the heavy plastic tubing that held her tied down. I cut through the tube once, unwound it from first one arm, then the other, and she was free. She clawed away the blindfold and gag, her fingers still clumsy from being bound.
“Come on!” I said. I grabbed her arm and hauled her out of the chair and away from the explosives. She staggered, leaning against me, and I ran for the stairs.
As we got to the first landing, my ongoing presence apparently became too much for the transmitter. Something sparked and crackled inside the plastic case, the cheery green light went out, and there was a huge and horrible sound from above and behind us. I managed to get between Alicia and the stairwell wall as the pressure wave caught us and threw us into it. It slammed my already-abused head into the wall.


Side Jobs, The Warrior, Page 256-258