trip wire

The trip wires were not difficult to negotiate once he had located them.

Be very hard - they could only do so by a fluke and I've set up a couple of trip wires.

Have Adams set them on trip wires about a third of the way up the slope.

He didn't see the trip wire until he was on it.

If it hadn't been Red out there, another man would have sprung the trip wire.

"And he's smart enough to be looking for trip wires."

If the people after me have some of your training, they might just be expecting a trip wire.

Also, at the moment, they made handy posts for the trip wires.

The trip wire was set across the trail of your blood.

He continued down the trail and reset the trip wire.