This perk does not seem to work when diving right on top of multiple zombies. However, as this is an explosive 'weapon', it should be noted that the player only receives 50 points per kill, when opposed to the 60 points that are acquired by using a bullet firing weapon, so using a gun would be advised if the player is going to buy something, such as other Perk-a-Colas. The perk is made from prunes and some types of chemicals. Between rounds 20 to 30, PhD Flopper will begin to make crawlers, and on rounds beyond 30, zombies will retain their legs even in the center of the blast.
The explosion is very powerful, with a maximum of 5000 damage at the center of the blast, and can kill zombies with one hit up to approximately round 20. 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. 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. Its icon displays a radiation trefoil emitting shock waves.
The Perk-a-Cola costs 2000 points and features a dark blue and purple color scheme, though primarily purple.
