I already know some of the Star Wars "Darth Vader" march
I know the Buckethead version of "Halloween"
...ummm... and Jaws

What are some other good ones?
Beavis and butthead.
Beetle Juice.
Mission impossible.
Heart And Soul (the piano song, not a themesong, but whatever)
Gibson Faded Flying V

Marshall MG100HDFX
Marshall MA50C

Boss DS-1
Digitech RP50
Digitech Whammy IV
Vox V847 Wah Pedal
Metal Mania (VH1 Classic) has a cool theme too.

Robot Lewis Stevenson of the Timesplitters group! Join!
Benny Hill
"That was it, a nick. Now happily paid for. [...] It was decided that it was so far away in time and influence that...well, you only get caught when you're successful. That's the game". Robert Plant