Skipping the Spider Ball: Furnace

Discovered by

Rage, Michael Poelzl, L33ch

Notes:

Press your face into the left side of the Spider Ball Track to exploit a clipping bug and slide right up the Track. Jumping can sometimes speed up the process.
This clipping glitch was fixed in the Japanese, European and Australian versions of the game. If you have one of those versions, use a Ghetto Jump to get into the Furnace, as shown below. Make sure to press all the way into the left wall, then Ghetto Jump backwards. At the maximum height of your first jump, Space Jump over to the top of the track as shown.
The Ghetto Jump can also be performed going forward, as shown below, though this is harder for some people.