Landmines, fire pits, and other hazards (such as areas being open to empty space) litter the field, which can be made of rock, ice, or even toxic waste or rubber, and players can lose health or die during the run of play (upon which they will fumble). Teams have special "Nasty Audibles", which are dirty (not to mention excessively violent) tricks such as exploding balls, invisibility, electric shocks, jet packs, or jumping the other quarterback with intent to kill, that lead to big gains and/or horrific casualties. Killing enough players causes an opposing team to forfeit.