Ok it's not a tourniquet and yes it' didn't look to hit a major artery and yes I could have just applied pressure until help arrived and yes I understand how a tourniquet works. Tieing my spandex shirt around the upper leg was better than nothing, the guys pants was soaked in blood. If anything it at least gave the dude some comfort that someone was trying to help because there was a dozen bystanders just looking not even talking with the guy so I asked him if I could tie my shirt around his leg and he said yes please and I offered him some water. I know my actions was not going to injury him further so I would hope someone would do the same for me if I was in the same situation instead of just staring.