"I wonder what next? Hmmm, something new. Oooh what about a bow?"
Jimmy grabbed a plank of wood, a wood cutting axe and a few other tools. He didn't have a real plan; he just trusted his instinct. Hack hack. The plank was split from being too thick, to now several even thickness, and made less broad. Testing the bend of the pieces, he quickly forged a bunch of nails, nuts and bolts from left-over metals. Hammering the metalwork into the wood, and using resin in ways he didn't think about, he managed to combine it all together.
As the time went by, and Jimmy manipulated the various parts and even somehow melted and beat and adjusted the curve of the bow, the form grew more intense and cultured. Most bows were single curved, other bows were double curved (only the experienced bowyers did so, and only for experienced troops), this one was triple curved. Mechanical pullies never before seen, some patterns carved into it. A beautiful polish.
The only thing remaining was to string the Bow and get some arrows for testing.
So Jimmy walked to the village - quite close by - and bought a number of animal body parts and materials for making a bow string. He excitedly got back to his workplace, and prepared the string. He settled for a goat intestine prepped with a special ointment Jimmy rustled up. With great care he got the bow strung and made sure everything worked together properly.
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Once he put it down on a bench to the side to start the forging of arrows, he found himself filled with pride where before that feeling common to him had not been present. The process of crafting good quality arrows took very little time, and soon he was able to test the Bow.
Figuring one of the nearby trees was as good a target as any, he gingerly nocked and pulled back the string - not fully since he was wary of what may happen to his hand - and released it at the tree.
A Thrum and an almost immediate Crunch sksk and crash as the adult tree was struck a mighty blow and the trunk fell over. Fortunately the opposite direction to Jimmy for otherwise it may well have killed him. "Oh."
Jimmy's father was there very fast and was in the process of being very angry but his avarice kicked in faster when he registered how much money could be gained from selling such a mighty weapon. Much rubbing of hands together and smug purple prose to the local lord later, and the lord was shelling out another chunk of his wealth for the Bow.
Some time later, that local lord was required to personally lead the defense against a roving Beast Man tribe that had encroached upon the demesne and had been raping and pillaging. Wielding the BECFE, he killed a great many of the Beast Men and forced them to leave for good. He received a great deal of respect and a new parcel of land with his work, and his humility made him a medium level noble celebrity of a kind. While normally proud, whenever he was in the field he was the opposite. This cycle continued, and in fact he ended up dying of old age having lived a decent life.