Brian Brian Dennehy gave me goose bumps in his portrayal of John Wayne Gacy in "To catch a killer"

I would never of believed the big teddy bear could portray such a monster.
As an aside; Jason Alexander made me so mad when he hit Julia Roberts in "Pretty Women" that I refused to laugh at anything George Costanza said for the first 10 or so episodes of Seinfeld.

Silly, but I couldn't help it. Honestly; I still don't like Glenn Close because she did such an incredible job in "Fatal Attraction"