'They're not going to be pushed around any more'
You know how horror movies are sometimes designed around a lack of budget? In this short film, the bloodthirsty killers are shopping carts! Once you get past that bit of silliness, this actually resembles a sequence from feature films you've seen. -Thanks, Anthony Carpendale!
A shopping cart (trolley, carriage, buggy)
http://en.wikipedia.org/wiki/Shopping_cart