Here's another possible explanation. I am not familiar with the poker room in question, but does it give you an option to fold your hand at any time during the hand, or only when faced with a bet call/raise? If folding in turn is not an option on this site, your opponent may not have wanted you to see the cards he was playing and was using the timeout/autofold/sitout function to muck his cards and get out of the hand before it was checked into a showdown. I have actually done that a time or two myself when the hand was checked to the river, I had no shot at the pot (holding 24 suited and the board is AKJ75 rainbow), and didn't want to show.
Originally Posted by colin_147
I got disconnected last night in a heads up game, by the time I had reconnected, I was down to my last 50 chips and all-in. The guy could have waited for me but just stole my blinds as quick as he could before I got back
I would have done the same
Really? And what's the difference between taking advantage of another player's disconnection when playing online and just reaching over and stealing chips from someone's stack when his head is turned in a live game? Not trying to be a pollyanna here, but there's advantages and then there's advantages. I'll act in turn in a normal manner, but I'm not going to take advantage of a helpless opponent.