It's a simple and an effective way of getting everyone on the same page, prepared and paying attention to the gag. People just get into that frame of mind of you doing impressions. It can take a minute or two for an audience to catch on when you aren't doing one.
Frank CaliendoSpeaking of Quarterback nicknames, you hear they're calling Jay Cutler 50 cent? Because you only get two quarters out of him.
Frank Caliendo