The name you are looking for is JAN DITGEN from Germany. He was one of the Invention category winners with this, and rightly so. It was billiant, baffling and very funny - especially watching the spectator's face as he realised he knew the answer!
Just for the record, the reference point for this was Sue-Anne Webster's brilliant FISM Reports Blog
, which is now online. It contains reports from the last 3 FISMs, as well as pictures and some video clips.