I dont know if anyone else found this but this does work in some instances involving entering a place that would make you take damage and teleport you back to the intended platform. Apparently, if you take enough damage to die from one fall, and you activate an extra life via the damage from a fall, if you fall again the game somehow doesent throw you back onto the platform, which will allow you to clip through the map to reach something below. I don't know if this will be useful but It might.