Yup, that's your standard BMX/pocketbike Frankenstein thingo.Either motorize a BMX or get a Zooma, that thing is dangerous!!The pedals will hit, at speed that will be like pole vaulting on asphalt, the bracket will break, if you have good balance you may survive it with road rash, not to mention the cops.
If you want stupid thrills look at a motorized all-terrain skateboard, I saw one searching for engines, 49cc's strapped to your feet, absolute madness!!