Vraclu, maybe you did invent it. I had never seen it before (maybe to zoned to remember) and knew this guy who had an over-the-top laugh starting with a distinctive BW sound. therefore I invented it too!
thought the prospect of that piece of culture originating on aw a possibility.
most excellent research and responses y'all!
I invented bwahaha!
<response> bwahaha
but I did, really!
<multiple responses> BWAHAHAHAHAHAHAHA!