Originally Posted by TheMan
It's fine. Unless someone dropped a cleveland steamer in it you probably have zero infection.
You should call it Bathroom Emergency barleywine.
OP: dont worry, if it was just the air lock that popped off, the out gassing from the active fermentation should have kept anything from getting inside it.
I cant remember what pod cast it was, but one of them did a big experiment with this, some one even went as far as brewing in a trough during primary, and didn't get an infection. The only exception were fruit flies, those little buggers will cause an infection. IIRC they said most infections are from contact contamination.
hope that puts your mind at ease