[Boone follows after Rex, they round a corner, and there's the sound of a scuffle. There's a crash, and then a pair of shades comes back into view. Rex rushes forward, finally grabs them, and crushes them between his jaws. When Boone comes back into view, his own shades are askew.]

Didn't know they could jump that high.

[Seeing the bits of glass on the floor by Rex, he heads over and shushes him out of the way. When he prods the pieces with his foot, nothing happens.]

...Is it dead?

[It seems that way, but he's still paranoid that one of the pieces will suddenly get up and run down the hall again.]