Here is a blitz game where I was losing, but was able to come back to win. This only goes to illustrate that in online blitz games, having a winning position in no way guarantees a full point, and tables typically turn many times. It is thus important to stay focused till the very end.
DDT3000-ERADICATOR, ICC, 2011
Black to move
Black played 26… Bxe5 which seems to be winning, but since White can’t recapture it because of back rank mate. I was about to resign, when I realized that I can stay in the game a bit longer by playing 27.g4
Instead he blundered twice with 31… Kh5? 32. Rh8 Bf3? 33. Kg3!
Black to move. Rxh7 is a mate threat, and he has to give up a piece and went on to lose.
Checkmate in the endgame is rare, so the irony is that on the first diagram White seemed to be forced remain down a piece to avoid back rank mate, and only several moves later – Black was in the same boat, except for this time there was no way to save the piece.