This happened last weekend. Had a really good run on this engine, it was just too fast for its own good. Im lucky the shrapnel didnt go through my leg.
http://www.oldminibikes.com/forum/photopost/data/500/medium/blowneng4.jpg
http://www.oldminibikes.com/forum/photopost/data/500/medium/blowneng5.jpg
http://www.oldminibikes.com/forum/photopost/data/500/medium/blowneng4.jpg
http://www.oldminibikes.com/forum/photopost/data/500/medium/blowneng5.jpg