I have a ~3 year old male Roughneck Monitor. After bathing in the tub for a bit, he will walk around with his tail in a "C" shape, but vertically.
I've never seen this behaviour in any monitor lizard before. It will last maybe 3 minutes, then return to his normal shape (straight behind him) as he continues to walk around.

He only seems to do this after a bath.

Any ideas?