orphan bean plant

[slugworth]

I had a bush type bean plant that never made it into the ground back in june when I planted the rest(I planted plants and not seeds)
It has been kicking around the yard in a container and at one point looked like a dead stick.
I put it on the porch in a sunny window and noticed today it had 2 beans on it.
The original plants are long gone but this indoor one keeps chugging along.
Should be interesting to see how long it stays alive indoors considering it's a bush type.