Knock over the fewest bowling pins

Task brief

The brief for the task is as follows:

Prevent the bowling pins from falling over.

You may place obstacles onto the bowling alley as follows: either three obstacles in one section, or one obstacle in each of the three sections.

You may only use the provided obstacles, which are: a water cannister, a shoe, a pipe, some tape, some string, a bunch of bananas, paper towels, and a cardboard box.

The winner is the one whose blowing alley has the smallest number of fallen pins.

You may not manipulate the bowling balls, the pins, the alley, nor the freeing mechanism.

The bowling balls will be released in 10 minutes.

Your time starts now.