Christopher Nolan has a knack for making movies that are hard to get your head around. Memento, Inception, and now Interstellar all left audiences scratching their heads, and it seems none more so than Stephen Colbert. Interstellar, of course, stars Matthew McConaughey as an astronaut leading a team of scientists into deep space with the hopes of finding a habitable planet to call home. It has become one of the year’s most nitpicked and debated films, from the sound mix to the science, audiences have enjoyed scrutinizing every element of the film.

Earlier this week Nolan dropped by The Colbert Report to promote Interstellar and Colbert took the opportunity to take him to task for his resume of mind-bending movies. Obviously we all know that in reality Colbert is an extremely intelligent man who likely understands these subjects pretty damn well, but if there’s anything more enjoyable than watching Colbert play dumb, I don’t know what it is. He even managed to make Christopher Nolan laugh, and that’s not something you see every day. Hit the jump to check out Stephen Colbert’s interview with Christopher Nolan and find out if we’re happening now or just watching ourselves in the past.