Pop flash

A pop flash is a flashbang thrown so it detonates almost the instant it comes into an enemy's view, giving them no time to look away and avoid being blinded. It usually involves bouncing the grenade off a wall or using a fast, short throw timed to burst right as it appears.

Because reaction time can't save the victim, a well-placed pop flash is a powerful tool for entering sites or taking aggressive duels. Teammates push the moment it goes off to catch blinded defenders. Mastering pop-flash line-ups for each map is a key part of high-level utility usage.