So, I was repeatedly playing 1-4, I jumped into the ceiling with Link and actually went through a portion of the ceiling. I started floating backwards until I gradually fell out of the ceiling. What had happened was I jumped into a corner where the ceiling and a firebar block met, and somehow end up getting through a block of ceiling. I was able to repeat this as Sophia III, Mario/Luigi while small/ducking, and Samus in Morph Ball. I could not repeat this with larger characters or characters who cannot duck in midair. This could be related to other collision bugs I've seen.