if you have enough speed, you can slide through walls, i dont know how or why this happens but i used it to cheese the final stage and also for other stages for accessing secrets.
you dont get much of a choice about it, accidentally sliding near and into a wall and then you end up on the other side of the map.
not common to happen, its more of a “stopwatch sucks because now time doesn’t work ever again because i used it 500 times” issue, its very late game into a broken run but i thought id put it here. caught me off guard but felt funny being in the terrain again, reminded me of ror1