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What are some odd places you've placed Sonic before?

I've had him:

On the very top of the Echidna shrine(Lost World entrance building)

In Emerald Coast, after the killer shark attack on the bridge, there's a huge rock to climb. I went up to it's peak. You can't get up there the normal way.

In Emerald Coast(again), At the entrance to the second area, there are some rocks on that ledge of the cave tunnel. I climbed on one and jumped to the rest. Behind that ledge? Nothing but a watery abyss.

I once fell through that light house in Emerald Coast, to my death.

On top of Tails' workshop/house/airport+runway combo.

In the ice stage, after snowboarding to the capsule, I climbed back up the wall and went to the ledge you fall from to reach the big empty snow space where those planes start dropping a few bombs on the regular route.

I got to these places using skill alone. No hacking devices or anything. These are possible as soon as you reach whichever area these tricks are performed.

How did I do all of these, and who else has done these tricks?

Oh, yes, and as for Sonic Adventure 2, in the regular chao garden, if you do a jump attack at a particular point between the rocks and cliff, you will go outside the garden and you can move around floating indefinitely. 3nodding

I also have gotten Amy, Knuckles, and Tails into Emerald Coast, and Knuckles in Twinkle Park.

I've tried to do this trick for a while, with no succes. In Sonic Dx: Directors Cut, you can get Amy into the Emerald Coast level with the help of the burger shop statue man. grab him as Amy Rose, and take to the entrance of Emerald Coast. make sure his feet are both on the steps and and the ground on the left side, then do a hammer jump on the left and make a sharp turn. I give credit to www.gamefaqs.com for this glitch.

誰かの願いが叶うころ　あの子が泣いてるよ
そのまま扉の音は鳴らない

I've had Sonic fall through the curb by a road to his death, and had knuckles drown outside of water. Sonic adventure and sonic adventure DX are awesome!

小さな地球が回るほど　優しさが身に付くよ
もう一度あなたを抱き締めたい　できるだけそっと

If you stop yourself at the first turn(going left) when the first whale chases you by jumping over and off the speeder tracks, then using the hammer jump to take the next turn, the second whale never chases you.

But Amy can't play in the second area of the stage. Nor anyone else. Just Sonic.

Yeah, I've done this myself.