From 5MadMovieMakers:
The ultimate backyard Hot Wheels track is here. Cross the high wooden bridge, drop into a vertical loop, and duck under the garden fence for the roller coaster ride of a lifetime. At 141 feet long, the car takes 25 seconds to complete the track at an average speed of 3.8 miles per hour, which in 1:64 scale is 244 miles per hour. Filmed with the Sony NEX-VG30H and a GoPro Hero 5 Session.