Ok, who remembers the exerciser thingie you put over the door knob? You would work your arms and legs with a pully system thing that attached to a door knob.
Have I mentioned it attached to the door knob?
Ya.. here I was, about 12 years old merrily working away with the thing, zip zip zip zip ... it's attached to the door knob. My sister comes in the door.... CRACK! splat-- the edge of the door went right into my skull.
So.. don't use the door knob exerciser thingies unless the door opens the OTHER way, away from you.
My grandmother had one of those. I guess I should be thankful it was attached to the attic stair door.

OK, here's a story. This one dates from about 1950. When my dad was a kid, one afternoon he had been riding his horse, and he rode up to the house and tied the horse to the back stairs.
The stairs were wooden and attached to the back of the house with a couple of bolts. My grandfather was sitting on the stairs reading the paper. My aunt came out the back door and slammed the door.
Anyone who knows horses want to guess what happened next?
Yep, the horse spooked and pulled back as hard as he could. Pulled the entire stairs right off the house, pitching Papa and Aunt Bonnie onto the ground. Much screaming and chaos ensued.
My brother and I grew up on that story and the mental image cracked us up, over and over.