My Superhero

The boys and I were playing downstairs today, and Owen kept jumping off of the fort/slide thing. Here is our conversation:

Me: Owen, please stop jumping off of that, you are going to break your leg.

Owen: Mommy, no I won't. I am not jumping, I am FLYING. I am Superman-boy, and my cape helps me fly. So it's fine.

How do you argue with that?