Haha the inspiration for the name was towards the middle of the trick where the yoyo goes around the whole string formation, it looked like a u-turn to me. That is why I called i u-turn. May i ask why you called yours left turn?
Its created by turning left while dismounting of a trapeze, making a 3d rectangle that extends towards me. (I usually start off in a wrist mount then pop off into the trapeze It has about 8 steps, but it was in my routine for my second yoyo contest, so I end up doing it a lot without thinking much about it.