This is really unbelievable!  Whywould black resign. If 10 ... Qe7 or 10 ... Nxe5 black wins a piece.

Here is a continuation provided by Chessmaster 10th edition at 20 seconds a move:

With the short time control the moves might not be best, but do illustrate the advantage.

Perhaps he was bored? Black is in a fine position. Here's one variation:

WHY!?!??!?!?!?

??If 10..Qd6, black still does have a playable game, isn't it?