Reese Witherspoon has a mean streak that gets her into trouble - she laughs about other people's misfortune.
The star admits she finds it hilarious when friends and loved ones fall over - and her odd sense of humor is becoming a real problem.
Appearing on late night show Conan, she reveals she accidentally shot her "This Means War" co-star Tom Hardy in the crotch with a paintball during the making of the movie - and couldn't stop laughing.
She said, "I burst out laughing in the middle of the scene... It happens to me all the time and it's terrible... My husband will fall down and I just start dying laughing because it's so ridiculous and absurd. Somebody told me their dog died the other day (and) I had to stifle myself."
And to prove her point, Witherspoon giggled as she recalled the tragic news: "It fell off the bed and hit its head..." She then stopped herself and added, "This is terrible; it's not funny at all... I feel bad now."