"If you need to goof around on set and ruin a take, don’t mess with Russell Crowe, Christian Bale or “Dead Man” Ledger because they will snap. Try ruining the filming of a scene that includes Dakota Fanning. She seems quite placid, but if she were to turn nasty, you could probably take her. She looks like a porcelian doll and her skull would probably cave in like a hollow egg shell."
-Some guy on Cracked.com