Coralej

Coralej backs up a ways, "I only sensed the first one, everyone back up, I'm going to check the space between us and it in a less subtle manner, then you guys can get to work disarming it."

When everyone else has also backed up he gestures towards that girder, lifts it a fair distance into the air and then sends it speeding into the ground.

Spoiler: OOC
Show
So getting a few squares back, then using Move Object (take 10 for 18, needs DC 15) to lift the girder up then hurl it down at square 1.