A bug, perhaps?
The very first time I played the level, the two hammers struck me at the same time, sending me flying above the screen, landing in the wall after a few seconds of flight.
I tried to do it again, but couldn't get back up. I could get launched into the air, though..
I could move around with normal physics, but either side of the wall had a one pixel thin barrier keeping me from falling back down.
Edit:
Green=approximate flight pattern if anyone is trying it..