On my opponent's priority, everything froze. I could still look at cards/graveyards, sound effects and animations were still there, but the game did not continue. And there was no rope/timer. I waited for 5 minutes to see if anything would happen and nothing did. The only thing I could do to leave the game was "concede" but even that did not seem to work. I had to re-boot the client. But when re-logged it had registered me with a loss, though I was winning at the time.