When I used to watch vaudevillian impressionists, people like Rich Little or Frank Gorshin, I always felt like the voice was the only point. I didn't want to do that. I wanted to be of the Robin Williams or Jonathan Winters model, where observation and storytelling was important.
Frank CaliendoIt'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 Caliendo