03/18/2010 05:12 am ET | Updated May 25, 2011

Stephen Colbert: Glenn Beck 'Raised The Stupid Bar' To 'Nearly Inapproachable'

When Chicago's Second City comedy troupe held a weekend-long 50th anniversary bash, the obvious highlights were Friday and Saturday shows with Martin Short, Steve Carell, Bonnie Hunt, Jim Belushi, George Wendt, Eugene Levy, Andrea Martin, Catherine O'Hara, Harold Ramis, Shelly Berman, Rachel Dratch, Robert Klein, Jack McBrayer and tons more.

There were also panel discussions, including one in which alumnus Stephen Colbert and writers on his "The Colbert Report" held forth. Along the way, they revealed what didn't get said at a controversial Washington engagement, underscored the impossibility of parodying Glenn Beck and wondered just a bit about the comedic forays of serious-minded news hosts like Keith Olbermann and Rachel Maddow.

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