Was washing my dads car as a favour and thought "hey, I should grab the keys and use the windscreen wipers to clean the windows instead" So I did just that. Only to leave the car unlocked for two nights in a row AND leave the car keys outside on the front part of the car..oh man
And another time, i kicked my bro's footy ball over our swimming pools roof..and that was the second one that I kicked up there and he just got it too so I felt really bad. So I grabbed the ladder, climbed onto the house's roof, crawled my way basically to the other side and jumped on the swimming pools' roof. Now the dumb part was is that the roof is really old right, its just some rusted metal layered on top, slightly over lapping each other. I don't know how it carried my weight, because it really wasn't stable at all.
Thinking about it, I could have fallen right through..and possibly have died.