<sod >Scroll down for video  Billy Monger, 17, lost both his legs from below the knee after a high-speed horror crash during a race at Donington Park in Leicestershire Campaign: Fellow racer Tom Ingram set up the fundraising page for Billy which has now it has the support of Formula 1 stars Lewis Hamilton and Jenson Button Shocking footage shows the terrifying moment the Billy crashed into the back of Pasma's car, after it appeared to stop suddenly on the track.< eod>< sod >  Billy Monger, 17, lost both his legs from below the knee after a high-speed horror crash during a race at Donington Park in Leicestershire Campaign: Fellow racer Tom Ingram set up the fundraising page for Billy which has now it has the support of Formula 1 stars Lewis Hamilton and Jenson Button  Support: Formula 1 veteran Jenson Button asked his follows to help raise money for Billy after learning the devastating news Button, who is making a one-off return to the sport at the Monaco Grand Prix, asked his followers to give Billy their support.< eod>