Douchebag wearing shades and leather jacket at train station decides that lines aren't for him. Cuts line right to the front, shouts at people in queue who tell him to get in line. Tries to buy ticket. Ticket guy says "First class or GTFO!". Douchebag slinks away to end of line which is now much longer. Instant Karma.
Rash driver dude drives rashly on the highway whilst talking on cellphone. Takes a sharp dangerous turn, thus very rudely cutting me off. Continues driving like nothing's happened and blows next signal. Look of satisfaction on my face as he's stopped by cop just 100m downroad from the signal! Instant Karma.
Person laughs at people for falling off windsurfing board. Said people swim and dunk person into water. Forced Instant Karma! (Yes, this one was me :-/)
Share your stories of Instant Karma too! :)