7 Days in Hell (2015)

In the vein of This is Spinal Tap, this mockumentary details a legendary match at Wimbledon that never happened.  Kit Harrington and Andy Samberg (in a role that just screams Andy Samberg) play two rival tennis players in a ridiculous match that lasts for seven days.  The documentary features clips from the "match," a voice-of-God narrator, "home footage" and talking head interviews with tennis stars and comedians, like a real genuine documentary.  Andy Samberg plays the adopted brother of Venus and Serena Williams in a "reverse blindside"--that is the most brilliant moment in the whole short movie.  Overall, it is so funny because the premise of this match is so preposterous. So long as you don't question anything too much, it is quite enjoyable. And who knew Kit Harrington and all these athletes could do comedy?