In PRIVATE, select an unpeeled banana.
Pierce with a sewing needle near one end.
Move the sewing needle, so that it slices the flesh, without damaging the skin.
Remove the needle, re-insert lower, and repeat slicing action.
Repeat until you have sliced all of the banana.
In public, peel the banana in the usual way, and express amazement at peeling a sliced banana! (It works best with kids)