Hot Wheels may be toys for kids, but it takes an adult to create the ultimate backyard Hot Wheels track. The good people over at 5MadMovieMakers assembled this epic two-story track that is a total of 141 feet long. It 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. Impressive. Watch above.