Now that you've warped from Stage 1 to the diabolically tough Turbo Tunnel level, you might be holding out a faint hope that there's another warp to take you yet further.
And it wouldn't be in vain.
You do have to complete a fair bit of the stage, but during the last leg of the Bike portion (where the level speeds up to a ludicrous degree) you will need to actually aim for the tenth wall (which is actually pretty easy to do, the hard part is not hitting the other walls that are hurtling at you at a thousand miles per hour).
Crash into the correct barrier and you'll be rewarded with another warp!
Which will spirit you right past the Ice Level and directly to the Surfing Level.
Hope you're ready!