How to make your friends and family never want to play uno with you again

I of all people found out a evil strategy in uno. so if you have like 4 cards in your hand you can hide all but one behind another of your cards, and when you place down that one it looks like you only have one card left. If it works as intended someone will call uno on you, and after that you can spread out your cards, to the look of horror of the poor soul who called you knowing that they now have to draw 2 cards. Anyways this is good at making people think twice before calling uno on you

The Backrooms

You've been here before.