Filmed at Chicago's iO Theater -- the training camp for some of the world's funniest improv comics -- this hilarious gala performance celebrates 25 years of laughs. For one night only, successful alumni such as Mike Myers, Mo Collins, Andy Dick, Rachel Dratch, Tim Meadows, Amy Poehler, Andy Richter and Horatio Sanz hit the stage to celebrate the spirit of improv and pay tribute to departed colleague Chris Farley and improv teacher Del Close.