So quite often when you are fistfighting, or blocking and then decide to take a pistol or rifle in your hand, it may happen that you are getting stuck in the fistfight blocking animation but have your gun in the hand.
Basically even you are fully equipped a fresh spawn can just punch you down that, because you are helpless.
You cannot fight anymore, not fistfighting, nor with your guns.

Picture: https://imgur.com/Ee5FUFj