Well, Amazon has a long history. Some idiot at a Pet_____ store was keeping him in a 1.5 gallon hex aquarium on his cash register. He grew up against the walls of the cage and the first 3 vertebrae at the base of his tail were compressed so there was significant tail injury.
Then 2 months after I got him we were outside, with him on a hip leash. A loud motorcycle went by, he got terrified and went into a death roll with the leash gently wrapping his tail. It never even went taut. That was apparently just enough of a tug for the tail to separate.
But on the bright side, his tail had been completely paralyzed from the injury. A few weeks after the drop, he started gaining slight mobility. Now he has full mobility, so apparently it wasn't completely the spinal cord injury that was keeping him motionless, it was just that his muscles had atrophied too much to move the full tail. Once the "load" was lightened he was able to rebuild his strength. Now he tailwhips his archenemy with great vigor, the evil bright red Coca Cola can.