Rex is about to comment on the growing stench when suddenly the pipe seems to give way and he begins falling. He shouts, surprised, but is cut off abruptly when he lands on the concrete on his back.

"Ouch."

It takes him a few moments to get himself up onto his elbows after that, and then onto his legs. But he manages to stand up, roll his shoulders a bit to get the pain out, and moves on.

"This isn't creepy at all."

He begins walking towards Gordon's gesturing tendril, cautious and wary.