Wow! BB got outta this one super-cheap knowing his KK was beat by hero's AA!

Seriously as a standard exercise I concur that this situation most often results in a showdown where BB has missed overs and Hero has a pair...

If I had to guess I'd agree with BB on AK/AQ and Hero on a non-setted pair like 55/66/99 and less frequently on Hero having paired an sc like 89s.