Yesterday - while I was getting ready to leave (as in standing by the door waiting for Pippi), Harry was busy jumping from the 3rd or 4th step while holding his sheet (he was supposed to be making his bed).
Pippi came downstairs.
Harry said to his Dad. "Can I jump off the roof with my parachute?"
Yeah. Time to leave.
And since he was still in one piece when I came home, I assume permission was denied.