THE "I WANT A SHOPPING CART/RAINCHECK" RUDE GUY

this guy, comes up to the register and i can tell he's going to be rude. he throws his basket up there and i think he's upset because it's overflowing and cans have fallen out. so, i go to check him out and he goes off on how we don't have any carts and that we need to call the police on the homeless bums for stealing our carts because we should have them available for customers. he is clearly upset about not having a cart, so i tell him that i'll call a manager. i call our assistant manager to speak to him and he now starts yelling at him. the assistant manager tries to explain it calmly to him, but he will have none of that. he starts screaming about how other shopping places are low on carts but they at least have them. the assistant manager tells him he will let our store manager know. the guy is still angry. oh, and i'd better not forget to mention that he had a raincheck that he wanted to use and didn't let me know until i had rung up 3 of 8 cans of clam chowder that he had. so, it had already taken a long time to ring him up. he buys some of our ice cream, which has a coupon, and so he gives me the coupon, which i have to tear out for him. now he wants a raincheck for a couple of items, but they're items that are in the 3-day sale ad, items that we are not supposed to give out rainchecks for. the ad even says "while supplies last" on it. but hey, people don't bother to read the small print. so, i'm trying to find the items in the ad, and he's impatiently yelling at me where they are in the ad. i tell him that we cannot give out rainchecks for 3-day sale ads. he goes off on me again and is yelling that we should have items that are in the ads in-stock otherwise it's false advertisement. he goes on to yell that it's only saturday. by the way, there are two other employees looking for a shopping cart for him and one of them who is nearby tells him that the reason why some items are not in-stock is because some people came in and bought 10 of the item. he wants his paper plates and ketchup for their sale prices and so i tell him i will call the manager again. our assistant manager comes back again and the guy starts yelling at him. after he's through yelling at him about the rainchecks and the assistant manager finally tells him that he'll give him rainchecks for those items, even though he's not supposed to and that's all he can do. he also wants to use some 50cent coupons from previous rainchecks and i let him use 2, since he only has 2 longs items. meanwhile, i've been giving him the total so he can pay and he refuses to pay until i write him his rainchecks. and then he asks for 10 of each item. what nerve! so, he's standing there waiting for a shopping cart after he pays and finally, one of the other employees offers to help hm carry his groceries out. finally, we have gotten rid of him, but not before he tells the employee who has helped him out to take a shopping cart inside so a homless bum doesn't run off with it (by that time, there was an available cart that someone had left outside).