I hope he will be alright.

It may not be typical, but like I said, my male would writhe and jump just like that, if touched. Very dramatically so..

And ONLY during the breeding season, while he was used for breeding. He was a real spazz and anything touching him got him to arch up and "jump around". Only when touched. Never any other time.

I hope it is nothing serious, please keep up up to date !!