The episode of the Terminal List where John Carter goes crazy with the Beretta semi auto. He reloads quick and overkills when he feels is necessary.

Michael Douglas goes to pump city in grand style in Romancing The Stone.

Chow Yun Fat with pump and elastic cord sling shooting around corners. Slapstick for sure but I always wondered if that idea might have come from the coiled telephone type rubber lanyards the RHKP wore with their S&W Model 10s. (Skip to 2:49 for the shotgun scene)

Tiger On the Beat

Heat, No Country for Old Men, the Terminator and Open Range, albeit one scene quite exaggerated