Is this a good move by Black

Bishop capture the pawn at c2.  

Pretend you are black and want to capture the pawn at c2.  Is that a good move ? Why do you think that is a good move ?  Why do you think it is a bad move?

The real game was found in chessgames.com 

http://www.chessgames.com/perl/chessgame?gid=1255318