Hello and thanks for the report! Yes this is a known exploit with a few map-specific files on our bug tracker. It used to be a lot worse when the sawblades would actually throw you high in the air. These days it's on only a few levels, and it's increasingly harder to do, but nonetheless we should fix them some day. Whenever there is enough time to get to the list of the many, many bugs in the current build of the game. ;-)
-Cheers