The Early Retirement skillshot is achieved by using the Head Hunter's Charge Shot to guide an enemy to his death before he explodes. This can be done by using environmental hazards such as cacti, rebars, newsbots, electro flies, or explosives.
It is a very good idea to use this skillshot to kill an enemy with electroflies, as there are very few places in the game where it is easy to kill an opponent with the flies. Simply shoot an enemy with the charged bullet and guide them to the flies (it takes surprisingly long for the bullet to detonate).
- Early Retirement is a reference to the enemy dying before expected just like someone being forced to retire before expected.