When the 10 minute stage suddenly turns into the fastest in category (MMRF: Port man out of bounds)

So it turns out Nitro man can just decide to clip through the floor pretty much whenever he feels like it. Super useful in the robot master stages he was already good at and also the puzzle fusions, so this is a huge win for 2015. Further testing is needed but it seems like puzzle fusions might actually be faster.
The clip: while on the ground, press B to hold a wheel cutter against a wall and then immediately pause the game. Release B before the game resumes and you will have installed the bug (lasts until taking damage or throwing a wheel). Walking off a platform in this state will allow you to clip through any floor as you drift downwards. Jumping in the grounded state will also cause you to fly up, holding your Y position to wherever you let go of the jump button. You cannot clip through walls or ceilings to my knowledge, but seemingly all platforms are completely hollow so you can bike out of bounds.
Navigating OOB: Clip through the floor then hold right and let go of the wheel. Begin biking when you land (hold it until returning in bounds). Listen until you hear nitroman fall onto the ground twice, then immediately jump twice.

[@1MCElias]

😅👍🏻