No. 1 answer is: Ask other customers if they have any Grey Poupon.
1. Ride the little electronic carts at the front of the store... Then when you're in front of other shoppers, conspicuously stand up and pick items off the shelves!
2. Walk up to perfect strangers and say, ˜Hi, I haven't seen you in ages.' See if they play along!
3. When 2 or 3 people are walking ahead of you, run between them and shout, ˜Red Rover!'.
4. Make up fake products, like ˜Poodykins', and earnestly ask employees where you can find them.
5. Follow mothers with children under the age of 12. When the mother lets the kid out of her sight, run up to the kid, take him by the hand, and walk out of the store!
full list via collegehumor
10. Play with the automatic doors.
9. Ride a display bicycle through the store; claim you are
taking it for a test drive.
8. While walking through the clothing department, ask yourself loud enough for all to hear, "Who buys this crap anyway?!"
7. Put M&M's on layaway.
6. Move "Caution : Wet Floor" signs to carpeted areas.
full list via indolink