I lost on time... In my opponents turn

I just lost a completely won position against my opponent on time. While it was HIS turn. My connection is fine.

How is this possible.

Who was your opponent ? Which game was it ?

http://www.chess.com/livechess/game.html?id=127226105

This game was it. I must admit I didn't a lot of time left, about 10 seconds.
But I have mated people with less time then that. I might not have made it in time but I never even had the chance to try it.

It doesn't even seems to have registerd my move. But I saw my opponents time running! I played Ke7 in under a seconds, so will within my time.

sometimes I see my oponnent's time running out when my internet fails. I don't know about it - oponnents time just runs out and I think that I have won - but then an "disconnected error" appears on my screen for a second - and it says then - that I have lost.