I had never heard of Del Close before learning of this illuminating documentary about his life. Close was a comedic actor and writer, but he’s most known as one of the major authorities on improvisational comedy whose list of proteges is impressive and unparalleled. Clips of Amy Poehler, Tina Fey, Robin Williams, among many of their peers, are shown praising Del Close. Bob Odenkirk, Tim Meadows, and Adam McKay are interviewed for the movie and they all have stories about the impact Close had on their lives. He’s probably responsible, at least indirectly, for a supermajority of times I’ve laughed in my life.