The chicken bomb mini-game can be found at the end of Millfields if you go to the farm instead of the other option, which leads to a boss. Rolling away is a good idea, however this achievement can be boosted easier if you have 3-4 players. Start up the chicken bomb mini-game and decide who will be getting the achievement. The other players in your group go to the middle of the arena, whilst you run around the arena.
The aim is that the other 3 players get killed, this will instantly end the mini-game as there is only one person left. If the person going for the achievement hasn't been hit then it will pop.
UPDATE: As NOBLEPX672 pointed out, if anyone struggles with surviving while going for the achievement, the Dark version of this mini-game starts you with only one heart, making it easier to die.