This is Lilly's favourite outdoor hobby: trampoline jumping. Since Lilly only had one leg (her left leg was amputated after a horrific car crash at age 13), the trampoline was modified to have a safety wall with a flap to prevent injuries. She never gets on it with a prosthetic leg though and she doesn't wear a shrinker sock (she sometimes wears one) either while on it.
Hehehehehe, okay, well my lovely wife is always hopping around on her single leg too, very sexy to watch in fact. She burns so much energy doing it, that she can eat like 3 lumberjacks, just hops off all the calories on her single leg and always stays 90 lb.. People ask her how she stays so thin and beautiful, she gets this mischievous grin on her face and says "oh that's so simple, just amputate a leg" LOL. She and Lilly have one of the few diet plans that actually WORKS.