What's the Best plot twist you ever read/watched and the most interesting plot you seen before?

What was the best plot twist you ever seen before? Like it was so good you literally had to stop reading/watching for a minute and think about life and wtf just happened ( of course it didn't literally have to make you do this but you get my point)

And what's something you read/watched before with a really interesting and unique plot that you never seen before or it's at least really rare to come across that kinda plot?