Heavy Drops are a type of loot that can be dropped from certain opponents. Unlike normal loot, heavy versions can't be collected manually and you must have a Collector do it for you. Also, there are blimps and towers (e.g the NOMS that can create heavy loot on the go). The range in which a bloon or blimp can collect parts grows as their part capacity does. (Some bloons or blimps can have things that influence this directly). *Collection influence is a modifier that can be raised by systems designed to collect parts.