1.) Lead vocalist lets out a blood scream 'Sacrifice!' (The front row goes crazy, they are ready to meet Satan).
2.) He burns the front row alive with a flamethrower
3.) They continue the show
Fan: "Yes dude! I'm so pumped to get fuckin killed! Cannibal Corpse kills without mercy!"
Vocalist: "AHHHHHHHHHHHH (shooting flames)"
this is called "the sacrifice" because it's similiar to when a tribe ties an animal or person to a pole as a sacrfice to some wild animal or god that will come and eat him later.