I have 3 for you, if you can record yourself beating them, it would be cool.
1- On Arch Acropolis, go on the curvy 4-way fork below the 15 secs TT. There are 4 branches, all at 90 degree angle. Do 3 laps around the pole by holding the jump button at all time.
2- Beat The Tale of the Tall Skyscraper sideways, without using any Super Jump or Super Speed after getting the last gem (you can just pretend you got all 35 gems, don't play through the entire level if you don't want to, or just remove all gems)
3- Beat Recoil Ultra Course upside down (if you don't feel like playing through the whole level, just remove all gems)