text: 'Screaming in agony': UPS driver Tom Ryan (pictured) lost a leg after getting crushed against his own truck by a car swerving to miss a jaywalker . A UPS driver had one of his legs ripped off after being crushed against his own truck by a car which swerved to avoid a jaywalker. Tom Ryan, 40, was struck by a Toyota while making deliveries on Staten Island, leaving the hanging by a thread. Onlookers used a shirt as a tourniquet in a desperate attempt to stop the bleeding. Witness Moe Sattar, a mechanic at the tyre store on Hylan Boulevard, said: 'Tom was screaming. 'One of his legs was laying next to him under the truck. Then he got quiet when he was bleeding out.' Mr Ryan, a married father-of-two, was taken to Staten Island University before being transferred by air ambulance to the trauma unit at Belleview hospital, FDNY sources told the New York Post. He has lost one leg, but is expected to live, a UPS representative said. The driver of the Toyota, which had North Carolina licence plates, told officers he swerved to avoid a pedestrian, according to law enforcement sources. Mr Sattar backed up this account, adding that the driver was believed to be a teenager. The NYPD said no charges were filed against the driver. He said the jaywalker stopped to rubberneck but left before emergency services reached the scene. According to Mr Ryan's Facebook page, his son, Malachy, believed to be aged eight or nine, was hit by a bus around four years ago while walking home from school. Malachy was a 'bloody mess' and needed a neck brace, but doctors said 'he would be OK', he wrote. Scene: Mr Ryan was struck by this black Toyota while making deliveries on Staten Island, leaving his other leg hanging by a thread. Onlookers used a shirt as a tourniquet in a desperate attempt to stop the bleeding .
target: Tom Ryan, 40, had one leg ripped off and the other left hanging by a thread .
  Onlookers used shirt as a tourniquet in desperate bid to stop the bleeding .
  Witness: 'Tom was screaming. One leg was laying next to him under truck'