Since the Jedi underwater breather thingy is just a rip of Sean Connery's gadget in Thunderball...
https://www.youtube.com/watch?v=QeoLKR1Q12U
If that's too subtle, the 007 theme would work as well.
JEDIT: You could also use the MST3K version of the 007 theme, as Agent For H.A.R.M came out in the latest DVD set. ;)