The Purple Helmets are, for better or worse, an Isle of Man TT institution. Their undoubted skill as motorcyclists is put to use doing bizarre stunts involving their 'heavily modified' Honda C90s, wheelie bins, roll cages, pianos and frequent nudity.
In other words the Purple Helmets are like the Isle of Man itself; frequently baffling to the uninitiated but a huge amount of fun nonetheless...
Beware, not safe for work or small children.