Petty stories.
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I met Tom Petty at the Gathering of Rainbow and Light in Ocala, Florida decades ago. He hung out a while with us to bulls**t and have a few tokes. Like one of the gang and not like other celebs who think they are too rich and important to be seen with us common folk. It was cool of him to take the time to do that. I still jam to his tunes. R.I.P.
Yeah I know that's not the "petty" meant in the question. But that's my "petty" answer. I don't clog my mind with the other petty nonsense. Meeting him was worth remembering.
So once I was annoying my brother, he just put the wrong passcode on my iPad enough that it was locked for some time before I could use it again.
A girl didn’t speak to me for three months after she said that I yelled at her. I had explained this to her, I can’t help it. I didn’t mean to yell but it sometimes happens on accident. She punched me later.