I have quite a few favorites. High on the list would be "The Blob" (the older one, with Steve McQueen).
Remember the scene where the kids are at the picture show and the blob "eats" the projectionist and the film runs out? When I was working at the local movie theater here as a projectionist during my high school years, I pulled that stunt during a midnight weekend show of The Blob. When the changeover came, I didn't do it, the reel ran out, and people started screaming their heads off in the audience. The manager came upstairs to see what the %$(^% was going on. He and I both had a good laugh over it.

Ah, the good old days... [Linked Image]

Mike (mamills)