Most games played on chess.com are speed chess, there is especially a lot of 3/0, 3/2 and 5/0. As long as you have a reasonable amount of material, or even just 2 heavy pieces, you never know if you have lost yet. As long as you get your pieces active and start pressing your opponent, you can "make your own luck" and get a swindle by creating a mating net or something like that. Chess games are not over until the game is history and you are out of the playing hall, or in chess.coms case, the game is in your games history
Its quite late for me right now and Im going to bed, but tomorrow Ill show a master game played here as a example
Okay now THAT was blunderific. Nice reversal though!