Left4Dead2 Visuals Multihack

IS THERE ANY WAY TO DO FAST DAMAGE, EITHER TO INFECTED OR HUMANS, LIKE THE HUNTER SCRIPT THAT WHEN YOU GRAB SOMEONE, THEIR HEALTH DROPS QUICKLY IN LESS THAN 3 SECONDS? I KNOW IT’S POSSIBLE BECAUSE IT GLITCHED FOR ME; I COULD EMPTY THE MAGAZINE OF ANY WEAPON IN SECONDS, AND IF I SHOT THE TANK, IT WOULD DIE IN 3 SECONDS, SAME WITH HUMANS. IF I HIT WITH M2, IT WOULD DRAIN ALL THEIR HEALTH IN 3 SECONDS, LIKE THE HUNTER SCRIPT. HOW DO I DO IT AGAINNNNNN?