WBCOOP one hand I'm proud of

Ok, so I was on the Bubble (two players before the ITM). I had an average stack. I was a small blind. The button was a bully with a large chip stack. He raised i had A8o and called a minraise.
The flop came 2 K 4 i checked and the BB bets half the pot and I know he's bluffing, cause he's been betting alot at the bubble trying to push ppl out of the pot, stealing the blinds and so on... so I raise - i'm pretty sure he's got air, but he calls. At this point i have about one third of the original stack remaining and thinking, if he had a K he would have pushed (maybe he can have 2 or a 4). The turn comes an 8 (I hit a pair). There are two hearts and two clubs on the board. I check again and he pushes all in. I think for a moment, close my eyes and call what turns out to be the bluff. The river comes a deuce and he shows 57s. I win and more than double - after
that hand I emerged as a big stack and never looked back...
Cheers