Look at this move he did.

Argonaut13

I didnt understand why he gave his bishop up for a pawn when I can easily make a "fake" castle, which I did.

Kens_Mom

Perhaps he had some success with it in the past?  The move is pretty dubious because there's not enough compensation for the sacrificed piece, but at least he could have followed up with more aggressive moves to make the situation more complicated for white.

 

Also, 8.Nxe5 would have won the piece back for black.

TeraHammer

24. Rc8 Rf8

25. Rxf8#