There's Something About Mary (1998)

Visible crew/equipment: When Ted and Dom are looking at Mary, speaking with Warren and Tad from behind the tree, if you look carefully you can see the camera and crew in the reflection in Ted's glasses.

Continuity: In the confrontation scene where all of Mary's admirers are forcing her to choose between them, Woogie is sat on the couch with a pile of Mary's shoes. Every time the camera shoots back to him, you will notice that the position of the shoes changes each time. This is also mentioned by the directors on the DVD commentary.

Factual error: The chiropractor that Ben Stiller's character visits says "Tender fascial tissue left of L7" as he is treating his back. However there are only 5 Lumbar Vertebra in our back, L7 doesn't exist.

When Mary is golfing and she meets Matt Dillon's character for the first time, the woman that walks by is the director's mother.

The man in the prison with the long hair that stretches his arm out of the bars while Ted is leaving is Cameron Diaz's father.

Dropping Ted while he was on the stretcher was not intended, it accidentally collapsed. When it did, the Farrelly brothers called cut to make sure Ben Stiller was alright, and then just left it in.