I thought I'd create this thread for people to feel free to post videos of either themselves, or vid clips you find on the net that you think are funny and/or good impersonations of famous personalities. I'll get the ball rolling with some of the better ones I've found:
YouTube - Impersonations by Kevin Spacey (Full Video)
YouTube - Denzel Washington Impersonation by Reggie Regg
YouTube - A Great Al Pacino Impersonation
YouTube - Frank Caliendo - Impressions
YouTube - Kevin Pollack - Walken impersonation
YouTube - Kevin Pollak does killer Star Trek comedy
YouTube - Best Arnold Schwarznegger impression
YouTube - MAD TV - Steven Seagal & Van Damme in One True Impact
YouTube - MADTV - Steven Segal's America
YouTube - Impersonations by Kevin Spacey (Full Video)
YouTube - Denzel Washington Impersonation by Reggie Regg
YouTube - A Great Al Pacino Impersonation
YouTube - Frank Caliendo - Impressions
YouTube - Kevin Pollack - Walken impersonation
YouTube - Kevin Pollak does killer Star Trek comedy
YouTube - Best Arnold Schwarznegger impression
YouTube - MAD TV - Steven Seagal & Van Damme in One True Impact
YouTube - MADTV - Steven Segal's America