When they built the store they included strips that I believe are magnetic under the ramps, parking lot perimeters and outside the doors that will make the wheels lock so the carts don't get stolen. The only way to unlock them is with a special key or remove the wheel. Those carts are expensive!
I really don't know i never used the wagons
I really don't know. Never use the wagons the day I was there. Sorry.
Physics... Applied.
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