Some questionable play. :)

[ericexiao]

Maybe he placed you on unpaired paint? You definitely repped something higher I guess though. I don't really know what else to say besides that he just lucked out or knew the outcome of the draw.
Focusing on being the hero, I probably would have dialed down the bet sizing a bit seeing that you're at 20/40 which is still early in the tournament. Maybe figure out how to size your bets so that you can either avoid the fact that you invested too much to bother folding with not the strongest possible hand and to make it so that you being all-in is actually a significant portion of chips vs. the pot since an all-in for you on the river was like a quarter of the pot, not a terribly significant proportion.

Just an observation from a guy who only dabbled a bit in poker so far though, so feel free to read over my analysis and disagree and/or critique it...