I'm sure at some point we have all had our card decline in a store. Maybe the bank as having an issue. Maybe you were overdrawn on your account. Whatever the reason is, it happens.
This customer flew into a rage, throwing bananas, knocking over tills and attacking a convenience store worker after his credit card was declined as he tried to buy M&M's.
Dude, chill out. It's ok. Have a Snickers instead.