Breakdown:

The closest thing to your arsenal to a heavy bomb is the Impact Mortar. It is designed as a gravity-propelled high explosive device made to scratch that hard to reach itch and reduce enemies to bits of pieces. Send this baby tumbling down the mineshaft for a tremendous blast to clear out the enemy. With a bit of afterburner, you can toss the Impact Mortar further and even bounce it off walls to get it around a corner. But, since it moves or floats so slow make a note, don't try to pick up all Impact Mortars you see floating around - it may have just been tossed by an enemy!!