Originally Posted by EventServices
If he's not hurt.
If the bike isn't damaged.
If he's not in imminent danger.
But really, I think you're required to laugh if he has time to say "oh ***" on the way to the ground. That's always comical. Like the coyote going over a cliff and holding up a sign before gravity does its thing.
What he said, with the following addition:
If he is hurt, or the bike is damaged, it's ok to laugh about it later, once he's healed and/or the bike is repaired.