During the production of Men In Black, the crew was warned that the sight of certain items could induce panic in one of the film's stars, Tommy Lee Jones. His unusual phobia? Clothing labels -- which had to be cut out of all of his suits!
[A source on the set of a promotional shoot for Men In Black II later reported that a publicist had assembled the entire crew and instructed them to "get rid of all T-shirts. If he even sees one, he'll walk off the set." The publicist then instructed them to remove all the labels from their own clothes too.]