Aaron Fotheringham is 16 years old and has been in a wheelchair since he was eight years old, as a result of spina bifida. But he didn’t let that stop him from attempting, and successfully completing, many of the stunts that his older brother and friends performed on their BMX bikes and skateboard at the local skate park. That includes what appears to be the first example of a wheelchair backflip — something that has landed him in the Guinness Book of World Records. Aaron, who turns 17 in a few days, has also performed a number of other stunts, including a 180-degree aerial, and you can see some of them here and here. He refers to what he does as “hardcore sitting.”