Matt McKeown, from Plymouth England, bought a £2,500,Chinook helicopter 150 hp engine on eBay and attached the jet engine, go-kart wheels and a braking system to a shopping trolley in just 6 hours. (back in 2013)

https://www.dailymail.co.uk/news/article-2375282/Motoring-nut-transforms-shopping-cart-jet-powered-mean-machine-breaks-45mph-speed-record.html
https://www.bbc.com/news/av/uk-england-devon-23249564/plymouth-man-s-racetrack-shopping-trolley-reaches-44mph