The rules around balking can be a bit fuzzy, even for seasoned baseball fans. But basically, the pitcher has to come to a complete stop before pitching, and they can't make any sudden movements that might deceive the runner. It's all about being smooth and sneaky - not jerky and awkward!
Some pitchers are total balk experts - they know just how to toe the line without getting caught. But others, not so much - they'll balk multiple times in a single game, and it's like, what's going on, dude? The crowd goes wild, the umpires get all worked up, and the game gets a whole lot more exciting!