If you're around enemies and need to desperately (and quickly) reload your weapons (primarily of the machinegun or pistol variety), try the following. Hit the reload button and then immediately hit the shove button to push a nearby enemy. When your gun(s) return to shooting position, they are automatically reloaded without having to wait for the clip to go in. This will save you precious seconds, and can even save your character's life if you find yourself in a bind!