DS2 in box in garden.
DS1 puts hardboard on top of box and consequently DS2 who isn't right in box.
DS1 gets on top.
I scream NOOOOOOOOOOOOOOOOOOOOOOOOOOO! like it has never been screamed before as I was convinced DS2 was about to have his neck broken.
I need a drink.
DS1 now crying as he just fell down the stairs. [karma emoticon maybe]