Indiana Jones

[snopes]

Comment: I was watching the Indiana Jones bonus footage on the trilogy's
DVD set and they show footage of Harrison Ford stapling his hat onto his
head in order to keep it from flying off when filming. I thought he was
just doing this as a gag for the camera, but a friend of mine told me he
really did it because his hat kept flying off in every take. Do you know?

According to IndianaJones.com

Did Harrison Ford really staple his Fedora hat to his head?
After trying glue, tape, and newspaper wedges, Harrison Ford pretended to staple the hat to his head in the TV special: "Indiana Jones and the Last Crusade: A Look Inside." Normally, his hat was actually kept on with double-sided tape.

[FuzzyJumpers]

Yeah, because stapling it to his head wouldn't have hurt one bit. Thank heavens for toupee tape.