Found as top comment here: http://imgur.com/gallery/DyQY1Nu
Stashed in: Memes!, Your argument is invalid., Smashing!, Hulk!
Hulk punching Thor and Hulk smash Loki:
xkcd.com | The pace of modern life
Luck and the entrepreneur, part 1: The four kinds of luck - pmarca *ARCHIVE*
How to make an animated demo video for your startup for $5
Photos of giant collections of animals