Board Thread:R2D - General Discussion/@comment-25576738-20150326104416/@comment-25394521-20150326224953

>If you get your weapon out, there's a chance it'll fall. Your character just makes it appear right in his hand due to roblox physics, which we are all used to. But, the mystery is when you have two weapons and jump on top of them right when they fall, also granting you supernatural jumping powers, but even higher jumps than one done with the acceleration rules of the knife.

TL;DR Weapon jumping. So much logic, too.