Oh i forgot, when i was five i was standing on the bench of a concrete picnic table, and the bench slab wasnt screwed in, and it flipped off, i fell off too, and landed on my shins. Didn't break anything, and I don't think it hurt much, but if i had weaker bones it would have shattered my legs. Also, nobody nearby was strong enough to lift it, so someone had to run and get someone, took like 5 minutes. Sort of scared me, but because of it we no longer have concrete benches in my town, theyw ere all changed to wood.