Robert Downey Jr. and Jimmy Fallon Have a Mountaintop Staredown

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In one of the weirdest Tonight Show sketches in a while, last night Robert Downey Jr. and Jimmy Fallon played two men who engage in an intense mountaintop staredown and ponder some of the universe’s biggest mysteries, such as the stories our body hairs tell, why sneezes sometimes never come, and Dominos stuffed crust pepperoni pizza.