I just babysat - my 4 year old Grandson had a good old fashioned temper tantrum. Last time I saw one of those my then 3 year old son was screaming and kicking in the foyer of our house. I sat on the couch and let him have at it. It was the one and only time he ever had one.
I did not react to my Grandson - no bargaining, about 10 minutes later he was running around happy as can be.
Boy, did that rattle me though!
I needed a good stiff drink.