Re: Banana tree snapped in half with almost mature fruit!!
For the future:
If there is any connection left in the flower stem, they will ripen normally ON the plant.
The best course of action is to leave them exactly as you found them. If the connection is already 100% severed then the have already been "picked" for you, and whatever will be, will be. If they are not 100% severed, moving them in any way may do more damage and get you to 100% severed.
I have ripened more than a few bunches that were "on the ground."