Sounds like it was fast and relatively painless. This is what we need to aim for in euthanization. I personally whack rats against a concrete floor. People can get upset about it if they want, but it is instant death. Much less suffering than your standard chicken goes through at the slaughterhouse to make your McChicken sandwich You can NOT hesitate though, and the floor has to be an ungiving concrete. Pick up by tail, whack. Over in literally 2 seconds. Some leftover nerve twitches, similar to a rabbit or other small animal that is shot by a .22 rifle. This method is actually less suffering-causing than the snake itself constricting the rodent; this is my litmus test.