I broke my sister's arm ...
Children are more stupid than their parents give them credit for.

Way back when I was a wee chillin of about 9, the family went on the traditional working class week-in-a-caravan type holiday. My 6yo sister was sleeping in the top bunk and I was in the bottom one. These were campbed canvas sling type things and as I lay looking up at the indentation of my sister's snoozing form above me, I thought it would be jolly funny to place my feet under her sleeping form and gently push upwards.

Being only 9 and therefore completely ignorant of Newton's third law, I was astonished to see her topple out of the bunk bed onto the floor with a thump and a loud snap.

Bless her wee heart, she never grassed and I never fessed.
(Que?, Fri 17 Jun 2011, 5:18, 1 reply)

I did that to my sister in a bunk bed
I was 6 and she was 7, and I put my feet up, and straightened my legs, raising the bed board. Which promptly tilted, and slipped between the rails and brought bed board, mattress, and sister falling down. Sis tumbled to the floor, but I leapt sideways, and was unhurt... until our mum ran in to see what the ruckus was about!

Must be something about the length of a child's legs in relation to the distance between the bunks.
( kila is reading clocks upside-down as usual, Sun 19 Jun 2011, 8:22, closed)