Ok so well for one I dont actually yell at any of the customers i just do it in my head. two I would love to say this to these few types of people: narsists, complainers, bitches, a** holes and so on. what i would like to say to them is this:

scream : Its a F***ing cart!!! nothing more nothing less!! Its not going to bite you or attack you!! its here for you to get ur s%^& and get out! Carts are walmarts way to help u complainers get ur s%^& and move on with your day! Carts are not going to be life partners, husbands or wifes!!! They are inaniate objects that help you carry things!! just quit complaining and take it and go!!

Also every time they come back complaining that the cart makes noise or they ask will it make noise, or bumps constantly, I would love to have all the carts be like that one and then say as they bring it back: "oh im sorry that one's not fixed here try this one its the same as the one you just gave me and so are the rest wink so i guess your going to have to put up with it or leave 3nodding "

But i cant say or do those things why...because i would get fired. so i will say this:

"Hello, Would you like a cart?"