In the animal kingdom, there is no sound imitator quite like the lyre bird. If you don't know what I'm talking about, you've got to check this out.
But if there is anyone who might be able to outperform the lyre bird, it would have to be Michael Winslow (Sgt. Larvell Jones from Police Academy, in case you don't remember).
In the following clip, which starts as some ordinary beatboxing, Winslow manages to invoke the spirit of some of the most radical electric guitar you have ever heard, and he's just getting started...
I never realized just how talented this dude is... I always assumed that the sound effects in Police Academy were exactly that, just sound effects. I stand humbly corrected.