It all began with Star Wars opening up the door with a #AskStarWars Twitter event. Marvel went right for the obvious and asked if they could borrow some lightsabers. Star Wars agreed but only if they could borrow Mjölnir.
That sparked some of the geekiest banter Twitter has seen this side of the galaxy far, far away. Applause for the folks running those acccounts.
See more of the tweets after the break.