I didn't know what was so funny at first. I watched EVH shredding and thought 'wow, he's totally sucking here' till I heard the drummer - sounds like a drum machine? THEN I got it.
My sides hurt right now! I just have to show these clips to fellow guitarists at work. I'm not telling them the joke just to see their reactions! It helps to see the real clips after (links are right to the side of the video on YouTube) so you can see how far off the sound is on these joke ones. Makes it funnier the second time around.
Shreddie Van Halen. Hahahaha

That Steve Vai one, I almost had soda shoot out of my nose at one point where he's totally sucking, and people in the crowd are hooting and clapping!
The effort that goes into dubbing these things. Kudos to the maker!