I’m kind of horrified to figure out “how”, like do they say “well time to start hacking off body parts” or just putting them in a room and someone just grabs a flamethrower, then after the remains cool down a janitor sweeps up what’s left of Jeff and tosses the dust pan into a container

Yup. A quick tap of the horn or double tap is fine. Even a 1 second blast. Once we get into 2 seconds blast territory, it transitions to rude, with 3+ seconds going up linearly on the deranged jackass scale