That's so darn cute! My spotted python does that sort of thing if she misses the prey I'm holding with tongs, she flings herself around with mouth wide
open, & tries to eat anything she can reach...her cage, her branch, her lower half...Silly snakes!
(ironically my spotted python has never once bitten
me, she's great to handle, but she's fed in her cage & just goes bonkers over food, making it a challenge to get it in her mouth)
Sure makes it easy to examine his mouth, eh?