Makeshift rocket sled stunt goes awry for Michigan man , authorities say . Authorities : A man was injured when he tried to launch a homemade rocket from his backyard in the Detroit suburb of Sterling Heights. Victim had reputation for doing `` crazy things '' at his parties , authorities say .
Makeshift rocket sled stunt goes awry for Michigan man , authorities say . Authorities : Man was sledding downhill when homemade rocket exploded . Victim had reputation for doing `` crazy things '' at his parties , authorities say .