I got so mad I broke cans at the grocery store
What made you so angry that you would break grocery store property?
I get mad at small things in my life.
Anger is a normal human emotion, but it needs to be kept in check. Recognize your frustrations early and resolve them in a way that allows you to express your needs without resorting to breaking things.
I'm always mad when I go grocery shopping. The line is always slow.
Have you looked into alternatives like order pick up or delivery? That way you can avoid any lines and get your stuff without the anger associated waiting with long lines.