Adrien Brody
Adrien Brody, wearing dreadlocks and speaking in a fake Jamaican accent, improvised an introduction for Jamaican artist Sean Paul while hosting a 2003 episode. Producer Lorne Michaels slammed the brakes on Brody, banning him for making an unintentional racist joke.
Rage Against The Machine
The band Rage Against the Machine was banned before even finishing an episode. In 1996, they were kicked out of SNL’s Rockefeller Center studios after only performing one of their two scheduled songs. Why? The first song was performed in front of an upside-down American flag. To be fair to the band, their use of the American flag as part of their stage show was well-established by the time SNL booked them, as seen in the above photo from Woodstock 1994.