When I saw Brainstorm in a theater, it was totally messed up. Apparently the projectionist was clueless as to the fact the movie had multiple aspect ratios. The screen was set for 1:85:1, and the 2:35:1 seqeunces spilled out over the curtains! This same theater did get things like Fantasia projected right, so I guess it was a fluke.
At home, we're often seeing more picture information that anybody ever saw at a theater. On one of my old Laserdiscs of 2001, a tiny bit of the lens hood on the camera can be seen at the bottom of the frame during Gary Lockwood's jogging scene.