This can also be used to escape abilities such as Cataclysm or The Box. This is useful for escaping but requires careful judgment of distance between the target, yourself and the wall to be hopped over. Vault can be used to hop over most walls by jumping off an enemy minion, neutral monster or enemy champion.However initiating with Vault instead of an auto-attack will put Harrier on cooldown, lowering her damage output. Vault triggers Harrier when used on a target, so after a target is marked with Harrier, auto-attacking it then following up with Vault triggers Harrier again, allowing Quinn to deal some quick burst damage.Vault has many uses, making it a very versatile ability in Quinn's kit.

Enemies marked by Harrier are visible in the brush until you trigger it or until it expires.

When Quinn is using Behind Enemy Lines, damaging her will end the effect.

Behind Enemy Lines can enable Valor to cross the map very quickly and attack you by surprise.

After being marked, move away from Quinn so she can't take advantage of it.

Also keep in mind any form of Crowd Control, as you will only end up giving the enemy team a free kill since Quinn is very squishy. Always consider that Vault will make you follow your enemy anywhere till Quinn hits it, so always take into consideration any enemy Flash or any other movement ability like Thresh's Dark Passage.

Be careful not to throw yourself into the enemy team by Vaulting into the enemy team, especially if your team can't follow up.

Use Behind Enemy Lines for traveling very long distances quickly, for farming minions around the map, or for chasing wounded targets.

Vault can sometimes be used to cross terrain if your back is to a wall.

Vault is powerful but must be used with caution, as enemies can attack Quinn when she strikes them.

Quickly consuming Harrier marks will allow you to generate them faster.

Attacking a Vulnerable target marked by Valor will put Harrier on cooldown.

Behind enemy lines lol