What are your favorite solos or instrumentals?

It can be on any instrument, guitar, keyboard, saxophone, violin, whatever you want as long as it's an instrumental showcase.

My pick: Randy Rhoads will, for good reason, forever be remembered for the riff to "Crazy Train" by Ozzy Osbourne, but his actual masterpiece in his short career is probably the insane guitar solos he plays for "Mr. Crowley."

So what are your favorites?