Crapcrapcrap. This is precisely why you attack when their attention is captivated elsewhere.

The RED Spy takes the hit and staggers back, cloaking as he does so. It takes a full second for it to conceal him completely and he has no qualms about fleeing back down the tunnel, hugging the right wall.

As soon as he's disappeared proper, though, he steps to the left and starts working his way back towards Teja.