Wait behind the door until some people come.
When they get near the door, jump out, wearing a costume, and holding a bag, and yell, "Trick or Treat!"
Look at them, scratch your head, and act confused.
Fill a briefcase with marbles and crackers.
Write on it, "Top Secret" in big letters.
When trick-or-treaters come, look around suspiciously, say, "It's about time you got here,"
give them the briefcase, and quickly shut the door.
Get about 30 people to wait in your living room.
When trick-or-treaters come to the door, say, "Come in."
When they do, have everyone yell, "Surprise!!!"
Act like it's a surprise party.
After you give them candy, hand the trick-or-treaters a bill.
Open the door dressed as a giant fish.
Immediately collapse, and don't move or say anything until the trick-or-treaters go away.
When you answer the door, hold up one candy bar,
throw it out into the street, and yell, "Crawl for it!"
Hand out menus to the trick-or-treaters and let them order their candy.
Keep asking if anyone wants to see the wine list.
Answer the door dressed as a pilgrim.
Stare at the trick-or-treaters for a moment, pretend to be confused,
and start flipping through a calendar.
Instead of candy, give away colored eggs.
If anyone protests, explain that the eggs are the only thing you had left over from Easter.
Answer the door dressed as a dentist.
Angrily give the trick-or-treaters a two-hour lecture on tooth decay.