The Quick Revive machine. Note the blood on it.
Quick Revive is an obtainable perk in Call of Duty: World at War and Call of Duty: Black Ops that is featured in the Zombies game mode. Quick Revive costs 1500 points, making it one of the cheapest Perks in the game. In World at War, this perk is virtually useless while playing solo, but the most useful in multiplayer since when you or a teammate is downed,you or your teammates are revived much faster than normal.
In Black Ops, this perk was given a more useful role while playing solo. It can be bought for 500 points and with the power switched off. When the player falls down, they will be equipped with a Mustang & Sally (unless the player has a Ray Gun, CZ75 (Dual Wield included), or Winter's Howl) and will be free to shoot the zombies while they are down. The zombies will walk away from the player while they are reviving themselves. After use, the perk must be bought again and can be purchased three times before the machine disappears for the rest of the match
This perk is handy to purchase if the player also has a distraction device (such as Monkey Bombs, Awful Lawton, V-R11 or Gersch Device) as they can pick up multiple players while the zombies are distracted.
It is effective to buy Quick Revive if the player's entire team is camping in one area and the player is normally in the back of the formation, allowing them to revive a teammate downed in front of them quickly.
On Ascension, solo players should buy Quick Revive before rounds 5-7 (The Space Monkey rounds). When the Monkey Round starts, camp at the Quick Revive machine, and knife the monkeys as they come to attack the machine. If the machine is unharmed, the player will get both Max Ammo and a free random perk. (Remember the power will need turning on.)
When playing Solo on Kino der Toten, if half between Quick revive and Juggernog and only having 2500 points after getting downed, head for juggernog as it takes more hits for a Zombie to hit you and Quick Revive is limited.
Quick revive on solo is a very effective method to kill The Pentagon Thief in Five by cooking a grenade at the beginning of the round and then pulling out your Mustang and Sally.
Despite the fact players tend to buy other perks before Quick revive, it is still very important to buy it in order to save players on high round because you can't trust people backing you.