My opponent forgot a queen and resigned

My opponent forgot a queen on f2 xD ...and then resigned:

A very common psychological trap for beginners.

Black attacked the white queen. The white queen runs away from the battle. Black thinks that they drove the queen away, and they are happy about it. They do not understand that a retreat may turn out to be an attack!

Is nobody going to call out the fact that Re5! is actually a great move. After Qxf2, black has mate with Rh5#.