Select Sonic or Blaze (recommended). Go to the level Huge Crisis (Zone 6) Act 1. Start by running to the right. Do the beginning of the level as usual until you get off the crane. Boost and kill the robot. You will get launched into the air. Once you see a cliff, do the Axel Tornado by pressing Up + R (Blaze). You should now be on the cliff. You will see a steep hill in front of you. Go up it half way. You will now see Sonic or Blaze do the 'falling off' animation, as if they are on an edge.