This is easily the silliest, daftest prank we've seen in a long time - and as a result, it's making us laugh like a drain.
It involves, quite simply, a man (magician Rich Ferguson) wearing a chair cushion costume (which we imagine was custom-made - not much call for 'chair costumes' in fancy dress shops), and then posing as a chair in a cafe... and waiting for people to sit on him.
It is, as we say, a silly, daft delight. And it's not the first time Mr Ferguson has unleashed his pranking ways on the public, oh no. Remember this sneezing-your-head-off prank?
(Via The Laughing Squid)