This one is useful for people with low(er) sensitivity and especially in instagib matches.

Keep a button pressed to:
Change to fist and continuously box while having higher fov and higher sens for the close encounters.
Upon releasing the button it will change back to shotgun (or rifle in instagib).

Adjust the settings like you need em.

Note: Originally comes from German pro-cuber Kracho.
He´s got it all elegant with aliasses and stuff, but I suck at scripting ;) it works though...