[gasoltub]

Assuming that it's not a trick question [img]/images/graemlins/wink.gif[/img]

I would be inclined to believe that hand 1 is genuine and the second is the bluff.

Hand 1:
BB got in for free so he could have anything. In particular, to make a play like this I would guess he's holding any 9, 94, 44 or remotely possible 88. He could even be holding a strong 8. An overpair is probably not likely since he didn't raise preflop.
On the flop he doesn't want to shut out the other two by raising, but they fold anyway. So when the turn was either a brick or helped his hand he goes for a raise.

Hand 2:
If you had a TAG read on UTG it would reduce the likelihood of the 8 helping him.
Hmm... when I think more about this hand it really doesn't feel like a bluff either. If he had bet out direct instead of c/r I would call down and perhaps even raise him.
The more I think about it the less I know [img]/images/graemlins/confused.gif[/img]

I guess I timed out on this one. But anyway my final guess is what I said earlier: hand 1 genuine, hand 2 bluff.