Those wacky Brits are at it again. A 52 year old man from Plymouth England, Matt McKeown, has attempted to set a new speed record with a jet powered shopping cart. It uses a modified helicopter engine for power and is stabilized with go cart wheels. McKeown has made the required two way run in the allotted time with an average spped of 45 mph. He has applied to The Guiness World Record people for certification. The previous record was 42 mph set in 2011.