Going Over Ladders Is Bad Luck Too...

I fell off of a ladder today. Not in a bad way. I didn't hurt myself. I hopped off and landed on my feet and got right back on, but it got me thinking. At what age does falling off a ladder stop being funny? As we all know, we hate getting that phone call from a relative with news that Grandpa has fallen off the ladder because we know that what is to follow is a list of broken bones and accounts of his hospital stay. As demonstrated in RiffTrax's short Down and Out, a 30 - 40 year old man falling off ladders is still very funny. So where is the cutoff point?