While getting a flat isn’t unusual this one seemed odd. I was talking to my neighbor after my ride, while sitting on my bike we hear a pop and air leaving the front tire. When I get home I pull the tire off there is no holes visible . I pump up the tube and some air is leaking out of the valve only. After putting in the new tube out of curiosity I pump air into the original tube and it’s holding air 3 hrs later. What could have caused a sudden loss of air.

Jedi mind trick? is this your neighbor?

Gremlins.

If your tube has a Shrader valve....chances are the valve spring failed while the front wheel was under load.

Why don't you just ask him if he's over weight? My money is on the Jedi

Lol, I will go with the Jedi,while I could stand to lose a few lbs I been riding at this weight for the last few years.