- Walk up to random people and say "WHAT YEAR IS THIS?" and when they tell you, get quiet and then say "Then there's still time!" and run off.
- Stand in front of a statue (any statue, really), fall to your knees, and yell "NOOOOOOOOO"
- Stare at newspaper headlines and look astonished.
There are more, of course. Read the whole thing. It made me laugh.