PhD Flopper

PhD Flopper is a Perk-a-Cola featured in Zombies. It was introduced along with Stamin-Up in the map Ascension and returns in Call of the Dead, Shangri-La, Moon, Cell Block and Origins. PhD Flopper also makes an appearance in part as a Persistent Upgrade on Buried as well as an unobtainable Easter Egg on the maps Die Rise, Mob of the Dead, and Blood of the Dead. PhD Flopper has been replaced by Widow's Wine in the remastered version of Ascension, Shangri-La, Moon and Origins, due to the absence of diving to prone in Black Ops III.

The Perk-a-Cola costs 2000 points and features a dark blue and purple color scheme, though primarily purple. Its icon displays a radiation trefoil emitting shock waves. PhD Flopper completely negates self-inflicted damage; however, the player will still groan and suffer temporary movement reduction when falling down from an elevated area. Another feature of this perk is that when players dive to prone from a height from which they would normally take damage, a 7.5 meter radius explosion is created upon landing.