Modification Re-adjust pricing on props.

I wanna know how the fuck a vending machine can float in the first place.

While a locker can be pretty heavy, it is hallowed out metal. A concrete slab can't be budged by one person where as a locker can. Go to a hardware store and try to pick up a bag of concrete. One bag is Usually 50 pounds and I'd bet it would take at least 10 bags to make a concrete road block which would equal to 500 pounds.

 

Perhaps the vending machine is (for some reason) composed mostly of cheap plastic and hollow.

 

Maybe the vending machine is from china and has canned air for drinks.
http://www.odditycentral.com/wp-content/uploads/2012/09/canned-fresh-air4-550x664.jpg

 

There we go.

There we go.