Why is the child screaming? Why did the parent let it get to the point where the child is screaming?

As a parent, I never let anything get that far. My kids never had any reason to scream out of pain.

I remember having to carry my very young kids (like 3 years old) out of public places because they threw a fit over wanting something or being over-tired, or having learned bad words and deciding to scream them at me. (That happened once in a Saks Fifth Avenue store. My son started screaming F**k you, Mommy! Because he had learned that word from hearing his father say it and my son was mad I wasn't going to get him something. I was so embarrassed! I just walked as fast as I could with him out of the store, past the make-up department employees who gave me appalled stares. Ugh!)