First of all, it doesn't usually work as intended. Although it does reset Stompy over solid ground, most of the time it resets the position with 1 pixel of the collision rect on the ground. So yes, it technically works, but I fear people might see most of Stompy's body off the ground, and try to make a desperate movement for land. I base this off of personally watching a friend play the game, and trying to do just that.
Second of all, this routine messes with the game's scrolling in very bad ways. I believe in the latest demo it is so bad, that if you die in Level 1, the SniperBots will appear to be in mid-air. I have since fixed that bug, though.
My goal today is to fix that bug, or at least make it less severe. I also have to go back and alter some old level designs to fix errors(*cough*end of level 2*cough*).