-One of the main parts of the game is that your shooting is only supposed to be accurate when standing still. The whole game is built around this concept because it prevents running and gunning and forces you to use positioning and abilities. Same as Counterstrike.
-Raze is a character that has two of these little C4 charges that explode and make her fly (without taking damage) and if she throws them at her own feet they will shoot her through the air. People will typically do this to move quickly past choke points or get on top of high places. This is only supposed to be a movement mechanic for positioning, not for use in gunfights, because the movement should mean her gun is completely inaccurate and basically useless. But the game is broken so people will regularly do this and somehow still get 1 bullet headshot kills while in mid air.
-150 is the max health, 148 is the most damage you can do from shooting someone without killing them.
-Sage is a character that can bring dead teammates back to life once every handful of rounds. It has to be used carefully, otherwise a huge advantage is wasted.
-Reyna is a "duelist" character, which is supposed to be the type of player that uses combat-oriented abilities and goes into fights first.
-And "Op" is a sniper rifle, which forces the player to kinda hang back and play slow... not something a Reyna should usually be using because it clashes with her abilities.
The clip at 0:20 and the one after it is EXACTLY what shouldn't be possible