When bad play saves your life...
After playing hunter 5 times in a row, I decided to bring out the Huntard Hunter deck. (unfortunately I didn't queue into a single one after that...).
Went up against this priest, got him down pretty well using secrets and aggro. Unfortunately I didn't draw any of my draw cards by turn 8 (there was a 7.8% of this happening) so I stalled out. I did have Leeroy in hand though... All I needed was a buff to finish him off.
He managed to clear my board with holy nova and wild pyro. With 2 mana left, he decided to not play around consecration or avenging wrath, and instead healed himself. With no opposing board, and no cards in my hand.
Sure enough his choice ended up being correct, since I would have drawn lethal that turn. He proceeded to PW: Shield his middle guy. He did this before attacking and without healing his pyro. So he lost 2 minions, missed 6 damage. He healed himself again.
Sure enough, healing himself to 13 put him out of lethal range of my topdeck again.
At this point, there was a 2.9% chance of me NOT drawing one of my draw cards, so I just gave up.