What do you have? Nothing?

[Tuff Luck]

I was recently playing with a bunch of friends, and we decided to ask a friend of ours to play who doesn't play a whole lot. Turns out he didn't have much of an idea of what he was doing so I have A8 and the flop is 882 so I now have trip 8s, and I'm betting and betting, and he's just calling me every bet. After the final bet I show my hand, and he says, "aww man.. I knew you had that third 8. Got me beat.." He shows his hand, and he has pocket 2s. Yea- he had a full house.. we pointed it out to him, and I let him have the pot. I was pretty pissed, but I know, in the long run, I'll be taking his money.