- 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"
- Take some trinket with you (it can be anything really), hand it to some stranger, along with a phone number and say "In thirty years dial this number. You’ll know what to do after that." Then slip away.
- Airplanes are terrifying. Also, carry on conversations with televisions for a while.
Now I'll have to go back to yesterday to pretend to be a time traveler.