In the game Left 4 Dead, while playing as infected, the team Booms, Smokes, and then Hunts in rapid succession. It is considered the most effective and efficient method of killing the survivor team.
**The Round Begins**
Harbinger: "Alright, everyone get set up."
The_Unseen1: "I'm in position for the BSH."
Sir Paul: "I'll boom them from up-top, you good to smoke?"
Harbinger: "Yup, and Unseen with Hunt last."