Flick

The core aim style on heroes that either kill in one shot or deliver large burst value — Widowmaker, Hanzo, Cassidy, Ashe. Because you snap the crosshair onto a target from a direction you were not watching and fire, the cost of a miss is high — whiff and you eat return fire during the reload or the CD wait. The flick pros actually use in matches is not a wide, forced swing from somewhere they were never aiming; far more often pre-aim has already put the crosshair close, and the flick only completes the final micro-correction. Choosing between this and tracking (staying glued to the target, for sustained hitscan) comes down to the hero and the engagement range. More precisely: it is less that you switch between the two than that the required aim style is already decided at hero select.

On snipers like Widowmaker and Hanzo, or single-shot burst heroes like Cassidy and Ashe, pre-aim close to where the target is headed and finish only the last small correction with the flick. On scoped Widowmaker in particular, precision on the micro-correction flick to the head line is what separates players.