Bill Hader is a master impressionist, we all know it. Here are some of his performances which are absolutely impeccable and funny. 0:00 Alan Alda 0:36 John Malkovich 1:02 James Mason 1:44 Henry Winkler 2:06 Jabba The Hutt 2:20 Seth Rogen 2:53 Jack Nicholson 3:14 Bob Simon 3:47 Keith Morrison 4:11 Fred Armisen 4:52 Harvey Fierstein 5:18 Jason Sudeikis 5:46 Arnold Schwarzenegger 6:49 Al Pacino