This Logic Puzzle Best Viewed With 3-D Glasses

Sneebles are a hypothetical species of sentient beings who live in a hypothetical world. They are perfect and instant logicians. They have big googly eyes that seem to jump right off the page, right at the reader. Some Sneebles have dots on their forehead and some don't; the distribution is random. However, if a Sneeble ever discovers whether or not they have a dot on their forehead, the next midnight, that Sneeble will explode iterestingly, with iridiscent sparks going in every direction. Sneebles keep in touch with each other and have good communication.

Quiz: A group of Sneebles are at a barbecue when a non-Sneeble (who is known by all to be incapable of lying) drives directly toward them, growing larger as it gets closer and seeming to move out into the intervening air between you and your monitor. The non-Sneebles calls out from his car: "At least one of you has a dot on his or her forehead." What happens?

( Answer - Don't click until you've solved, given up, or lost interest! )