I've been looking and can't find any thread where this would fit, so gonna start one.
Share your WTF moments! Actions so stupid, genius, lucky, unlucky or just plain improbable and illogical you just could not help but stare, gape and wonder "What the fuck was that...?"
One piece from me: Been playing due queue with a friend, he lately took a liking to supporting with Nunu. Well, Nunu stealing a dragon or such ain't anything special, is it? How about stealing it with his -ultimate-? We got our asses kicked in a small fight near the dragon, ended up retreating and giving up on the flying lizard. My friend arrives late, and knowing the dragon is underway he flashes into the pit only to notice the dragon has been leashed out and the enemies likely are in fog of war outside. Now, instead of trying to consume the bastard and probably dying afterwards he decides to remain hidden inside behind the wall and starts channelling the Absolute Zero. Effect? A double kill along with secured dragon with a full, 3 second ultimate fired off plus the biggest WTF face I made in a long time. It was freaking worth it do die and lose that fight just to be able to witness that action in its' full glory.