I played well in this event right up until the end where I made a rash decision.
We were down to about 220 players with 120 spots paying and blinds of 300/600. I had 15,000 chips (average was about 25,000) and was in the big blind. The small blind had about 40,000 and 100% of the time that it was folded to him when he was in the small blind or on the button he'd raised.
So when it was folded to him the the small blind of course he made it 1,800 to go. At this point I had his range being all 169 possible combinations of two cards. I got dealt K9 so I made it 5,400 to go.
Up to that point everything is good. But when he put me all in I should have folded. I'd be leaving myself with 17 big blinds which was plenty to continue. But I got too attached to my initial read that my opponent was full of shit. I was looking at that pot and thinking that I was getting 2 to 1 on my money when I was probably a 3 to 2 underdog (like I would be against Ax) or maybe 55/45 (like I would be against a small pair).
The problem is there is no way for me to ahead at this point unless I'm against a 4 bet pure bluff. It's a recipe for disaster to put an opponent on a total bluff like that. I didn't need to make the "hero call" here. I'm sure I could have found a better place to get my money in the pot.
In the end my opponent rolled over AK flopped an ace and that was it. This felt like another wasted opportunity.