I was playing Machamp with my Butterfree-Cherrim deck. They Leveled-Up to the Level X. They used Break-Through (or whatever its called) and I hoped for tails when I attacked. The flip was heads. The process was repeated again, and he got a KO. I then send up a Butterfree. I KO'd his Level X. He then sends up a Machamp from the Bench. I could win if he didn't throw 4 heads on Hurricane Punch. I'm pretty sure you know what happened....
Another time, I had a Caterpie vs. his Baltoy start. I go first. I flip tails on Pupate. I played 2 PlusPowers, thus dealing 50 damage for the Knock Out. I donked with a Caterpie! =S