Preheat oven to 425 degrees F. Bake pie shell 10 to 12 minutes, until golden. Remove from oven and let cool.
Line the baked and cooled pie shell with a layer of chocolate pudding, half of the prepared amount. Add a layer of bananas. Top with remaining prepared instant chocolate pudding and remaining bananas. Cover the top with a giant swirl of whip cream from the spray can, starting at the center and working out. Shave a chocolate bar with a vegetable peeler and top pie with shavings. Serve immediately.