Mark Ruffalo, the Hulk in Avengers: Age of Ultron, was a guest on last night's episode of The Tonight Show with Jimmy Fallon.
Ruffalo relayed a story to host Jimmy Fallon about how he scared one of his daughter's preschool classmates by pretending to Hulk-out.
It seems the child wasn't as ready to see that transformation as he thought.
Check it out below:
Avengers: Age of Ultron opens May 1, 2015.