woah, you're giving me flashbacks to a few weeks ago! i was also in a rainy crit, and someone went down right in front of me an another rider also on the last lap. i was lucky enough to avoid it without much trouble, though, and finish 5th. (i'm in the blue)
another similarity is that there was also an early three rider break that i never even saw which got away.
it wasn't until the next week that i took my lumps when i was taken out by some incompetent idiot who chopped my front wheel.
glad you came through it ok, and sorry about your bike.