I sometimes (if I'm loot lucky) have a rifle of sorts (let's say an SKS) that I'll wear on my back and I'll carry anther rifle (let's say a mosin) in my hands. That's great to be able to do. However, if I log out and then later log back in, my mosin will no longer be in my hands, it actually goes into my inventory. I can run around full speed with nothing in hands, and when I do arm it or put it into my hands it goes lightning fast as it bypasses the arming animation. This can be used as a hack, logging out and logging back in so your 2 rifles are both in your inventory so you can travel at top speed but then arm yourself at a speed that is unintended.