Probably back when I was in my teens at The Domain rock concerts. There were these bloke's going around dressed in Flintones outfits as part of the hired help ( by organisers ) etc, to entertain the smaller kids that were actually at the concerts as well.
Anyway, me and my mate were both suffering from the effects of an overdose of brain cells demise at this time , as you did back then at a concert. We thought it would be a great idea for me to bend down behind Fred Flinstone, whilst my mate pushed him from the front, causing Fred to fall over in front of several thousand onlookers.
Well we did, and Fred went down like a bag of it, landing on his arse.
To our surprise and uncontrolable gut wrenching laughter, Fred then jumped up and shaped up in a boxing stance. I almost had tears running down my eyes with te laughter, but Fred was serious.
It was only when several startled and horrified little children started crying when Fred shaped up and was yelling " You f**king little C's " that Fred realised he was still in the costume.
Was fricken hilarious. But a piss weak act in hindsight.