Short stories with a twist ending.
You may already know a few short stories from the list below
feel free to read all of them if you're a fan...
What about discussing those 2 ? https://en.wikisource.orgwikiReginald_in_Russia_and_Other_Sketches/The_Reticence_of_Lady_Anne by Saki
http://www.classicshorts.com/stories/lamb.html by Roald Dahl
but you can also share one of your favorites!