What's the funniest mistake your parents did while trying to be a good parent?

My dad worked a lot so we'd watch movies on the weekend to hangout. My dad saw deliverance was on tv and only remembered liking it. Then came the "Squeal like a pig scene"... I was 12. I can still remember the literal face palm he made

In that vein my mom also still thinks Good Fellas is a comedy. She's easily seen it 3 times