While grinding more IL runs of the map pack I noticed that the conveyers will completely stop you if you hit it from under one facing up at the right angle. Have no idea if this could be useful in runs (highly doubt it). Something I do think would be good for runs is another I just found where you can store the momentum of a conveyer if you quit a level while on it, and quickly enter another. I'm playing the game through the standalone Flash Player EXE via the version from The Basement Collection.