Skipping the Spider Ball: Twin Fires Tunnel

Discovered by

Amasawa, DEVILBIT, kip

Notes:

Be sure to lay the third bomb in the Double Bomb Jump after you have begun descending from the first Bomb's explosion.
There is also a Dash Jump method of crossing Twin Fires Tunnel without the Spider Ball, shown below. Since this Dash Jump uses the Scan Visor, it is only available to players of the original North American version of the game (it doesn't work in the North American Player's Choice version).
There is also a faster way of doing this room.