Lord of the Rings: The Return of the King - Frodo's Boxers?!?!
After being wrapped up in Shelob's web, some orcs come barreling along a path and see Frodo. They take him to their tower and take away his clothing and belongings. (In the book he is supposed to be naked, however that would up the rating.) He is laying on a slab/table. If you look at his pants, right at the top you can see something white. It appears to be the waistband of boxers or tighty-whiteys. Lemme know what you think.
Lord of the Rings: The Return of the King (video or DVD, extended version or regular)