Funny!
Those were brilliant. Even better than 1 and 2. These were my faves:
*Bean running all over the place (lol)
*Silver running really slowly, and not being able to do the loop (I'd like to point out to Silver that he could just 'cut across' the loop...but you can't do that in a Sonic game, I've tried :P )
*The Spnic Underground parody (the look on Knuckles' face XD)
*The one where Big hanged himself (yay!)
*The preloader (A Chao walks into a bar...)
*Chaos...Swiss Roll!
*The Sonic X parody (I can has Chaos Emerald?)
And the bit at the end with Tails Doll...that was really creepy...I'm gonna have nightmares about that tonight...
I'd do something for Volume 4 but I can't animate for squat. Shame, that.