let's see how deep the trivia hole goes...

bearkub

Clues up front: Older film.

"..but yah ARE in that chair!"

KeyserSoze

I think the first word I read ("Clues") is influencing my guess, but I'm going to go with "Clue" the movie.

I haven't seen the movie in a LONG time, but I remember Mr. Boddy died in a chair (the first time he died, that is), and the butler (Tim Curry) later claimed that he was actually Mr. Boddy and that Mr. Boddy was really the butler. The identity confusion and the thing with the chair seems to fit the quote.

bearkub

nope, waaaay older than that. Black and white, as it were.

danr

whatever happened to baby jane?

4th scariest film, ever

bearkub

fucker. I knew if anyone would get it you would. Yer up Dan.