Bommel tips the strange elf away from the long way down. But that leaves the mysteriously vanished strange elf. And the splashy sounds! Wobbling left and right, Bommel can't spot a thing, so instead his trusty nose is on the case. There is a little bit of regret involved in that deep breath in, all the acid getting thrown about on the bridge stinging his nose. If the others were closer, they'd see the silktail's face scrunch in a great many ways. Still, gotta look for the fire-firing meanie! And HROMP 'em!
Spoiler: Actions
Show
Move Use Scent to maybe pinpoint the elf's location, should Bommel be that lucky. He also does a five-foot step towards the center of the outcropping he is on.
Standard If Bommel is able to pinpoint the elf by happening to be within 5ft of them, he does a big ol' bite (with Power Attack -2/+4)!
(1d20+15)[31], (1d3+14)[17] physical damage