The secret to using one, is to push the saw (not the blade) tight to the pipe (in the direction of blade travel), and hold it there while you cut.got a buddy who has a Sawzall and knows how to use it. i buy him nice blades....he cuts pipe.
if i get great deal i put a PVC cap on them.The only cure for that stump sticking out of the ground however, (just high enough to catch the lawnmower and sharp enough for the grandkids to take a trip to the emergency room) is dynamite. Although I have used the sawzall to make several vertical cuts and hammered it over.