Challenge of the week for everyone.
1. Buy a ridiculous hat, mask or costume. Try and mix-and-match unrelated stuff- gorilla with over-sized sunglasses, robot with huge mustache, wig and huge tie, etc. (Must not significantly restrict vision.)
2. Keep it in the car. Any time you drive anywhere, put it on. Take it off when you get where you're going. (Make sure to keep a straight face and act normally. You'll get lots of honks and hand gestures, just ignore them.)
3. Hilarity ensues. (Watch out for distracted drivers swerving into you, though.) Continue for one year or more (optional.)
If you take it on, post up a photo of your getup.