In honor of this video where Hannibal Buress calls out Bill Cosby on stage, today we count down the Top Five Comic Feuds! 

#5) Joan Rivers vs. Chelsea Handler

#4) Eddie Murphy vs. Bill Cosby (apparently Hannibal Buress isn't the only comedian who had problems with the 'Cos)

#3) Louis CK vs. Dane Cook 

#2) Joe Rogan vs. Carlos Mencia 

#1) David Letterman vs. Jay Leno (probably the longest running and greatest comic feud of all!) 

Here's the most interesting thing you'll read all day- an entire timeline of their feud right here!