Scarlett Johansson almost jumped out of her seat during a recent taping of The Ellen DeGeneres Show when Avengers castmate Chris Evans pulled a prank on her.
Captain America crept up behind the actress as she chatted to Ellen and yelled "Scarlett" right behind her.
The Lost in Translation star quickly regained her composure but Evans was too busy laughing to speak.
Following the scare, the two co-stars took part in a game testing their knowledge of each other.
The episode aired on Thursday (30Apr15).