The 弹跳杰克南瓜灯 is a 困难模式 pumpkin-like 敌怪 that will only appear at 夜晚 during the 万圣夜 季节性事件. It attacks by hopping towards the player in a manner identical to most 史莱姆s. The difference, however, is that the lower on health it is, the quicker it becomes.
Notably, despite using the Slime AI, it is not treated as a slime for most other purposes. Hoppin' Jack drops no 凝胶 on death, will remain hostile to a player with 皇家凝胶 equipped, and killing one is not necessary to earn the 明胶世界之旅 () or 恶翅史莱姆 () 成就s.