I don't know how I do it exactly.If you want to reproduce this, last thing I was doing when this happened is proning,one way is to come up to water pump with nothing in your hands. and then jumping over something.
One guy said he had gun,Then you spamm press "F" and then take Axe for example to you hands...
I tried this. and he was at the Water Pump,But I did something else as well and this bug showed agian. heI was spammplaying by pressing "F"normally I didn't spamm anything and thisis is what happened to him.
I don't know if heI think I was lying down, l was holding a gun in his handsn axe in my hands, then went in inventory and I ate some food, or he didn't and then when he took the gun he held ithis Axe in only one arm...hands again, it was crazy.