PhD Flopper is a Perk-a-Cola Machine that appears in the Call of Duty: Black Ops Nazi Zombies maps Ascension, Call of the Dead, Shangri-La, Moon, and secretly on Die Rise . After the player buys the perk, all damage that the player could cause to themselves by explosives and fall damage is nullified. For example, a player could cook a grenade and let it explode in their hands, not harming the player but still inflicting damage on zombies. It completely removes splash damage and adds a miniature explosion whenever a player with the perk dives to prone. However, the explosion only occurs if you dive high enough that you would normally recieve fall damage. It instantly kills all zombies within the small radius of the explosion in the earlier rounds and makes crawlers in the later rounds. Any kill you get from the explosion is only 50 points like all the other explosives.
- PhD Flopper will protect you from any fall, for example, the lighthouse in Call of the Dead.
- It is not actually a vending machine. Instead, it fills a cup placed under the nozzle.
- According to the players, PhD Flopper taste like prunes.
- Takeo is allergic to prunes, making this his least favorite perk
- In the new Die Rise map on Black Ops 2, PhD Flopper is secretly located on the 3rd level when going down the broken cargo elevator (at the begining). It is physicaly impossible for the player to get to it because there is an invisible barrier around it. It is easier to see this perk machine when going into theater mode going on free camera.