Jenga is a game that really hammers home the fact that you lost. You literally break the game when you lose, sending the pieces everywhere. Imagine if when you lost at Chess the entire board exploded in your face. That's insult to injury. You can't help but give a frightened/excited expression when the Jenga tower finally falls. It's a visceral moment. That's how you can spot a psycho. If they don't make a single reaction when the Jenga tower falls, you should run. They're going to murder you.
The best way to play Jenga is giant Jenga. That's where each piece is the size of a brick. You thought regular Jenga was intense? These bricks can break your foot, homie. OK, so maybe they're not that heavy. Friction wouldn't allow for you to move the pieces *pushes up nerd glasses*