I've got fourty, here they are:
1. When the voice on the intercom comes on assume the fetal position and start chanting "The voices are back."

2. Walk into an aisle by yourself then suddenly turn around and yell "How could you do this to me!?" at the top of your voice. Then fall like someone knocked you down.

3. when an employee asks you if you need help scream "CANT YOU JUST LEAVE ME ALONE!?" and run off.

4. climb inside a display rack and claim you don't kow how you got in there, or talk to people walking by who can't see you.

5. Walk up to one of the door greeters and ask where the exit is.

6. Swich the price tags of products. Example: pull the expensive price tag off a ps2 and put it on a cheap can of beans. put the tag from the beans on a ps2.

7. Walk up to an employe and start yelling at him in a different language. If u don't know a different language act like u do.

8. Stay in the tent in the camping section over night. When u wake up in the morning, and a worker passes by, shout "bear" as loud as u can.

9. Go into the parking lot and place a large rock in the lane. When someone runs over it, act like they ran over your foot.

10. Get brown paint from the arts and crafts section, and when no one is in the restroom squirt it all over the inside of the stalls.

11. Get a sharpie, and deface all the posters on display.

12. Wear camo and bring a stuffed animal and binoculars to the garden section. set the animal on one side of an isle and u sit on the other side staring at it through the binoculars. If anyone asks u what u r doing tell them u r on a safari and to be quiet or they'll scare the animal away.

13. Two words!
SOCK SLIDING!

14. put random objects in trolleys as you walk by

15. Climb inside a trolley and have a nap

16. put vegetables inside clothing or storage boxes

17. build towers with things

18. randomly follow someone around, and if they start to run away scream "Mommy/Daddy don't leave me!" it's soo funny.

19. Walk around and just randomly point at things and burst out laughing, and if someone asks what your doing say your imaginary friend just said a really funny joke.

20. Go up to people and ask where babies come from.

21. If an employee asks you if you need any help. Start talking in third person. "Carl is lost" "Carl needs to find...."

22. Ask employees for some made up thing, and get really angry if they can't find it.

23. Take the workers buggies and hide them somewhere.

24. Steal all (if any) samples before anyone else can get to them.

25. buy a bag of skitles and find somewhere that alot of peole pass by.... start throwing said skittles art random people shouting "TASE THE RAINBOW...TASTE IT!!"

26. Hide in the clothes rack, when someone comes by pop out and say "pick me"

27. stand on the check out conveyor belt thingy and walk on it like it's a treadmill

28. try on a whole bunch of cloths that don't match, each time you put on a different outfit, walk outside the changing area and ask a random person if you you look pretty

29. call wal-mart and ask them to deliver a pizza to your house

30. set all the alarm clocks to go off at the same time

31. put a "caution: wet floor" sign on the carpet

32. Go there with the intent to buy a lot. You can be grocery shopping, clothes shopping, whatever. But spend a lot of money! Go ring your stuff up at the self-checkout thingy, and then, pay for your item(s) using all ones and pennies. Try to see how many annoyed people are behind you. The more, the better!

33. Go to the electronics section when they're playing a movie on the TVs. Buy some popcorn, snacks etc. and make yourself comfortable right in the middle of the isle so people have to step over you, then watch the movie over and over, but don't buy the DVD.

34. Go to the camera display section and take flash pictures of all the people who walk by.

35. Turn all the radios to different stations and turn them up as loud as they will go.

36. Go to the changing rooms, then demand that they prove to you that there are no security cameras looking at you.

37. pick a random person and follow them around like a really bad spy complete with tumbles and humming loudly to the Mission Impossible theme song.

38. stand in the meat section with a blank face and then make ur eyes go wide and shout "I'M A VEGETARIAN!"

39. Put some sunglasses on and pretend to be blind and walk around anoying people

40. Hide in one of the circular clothing racks. When somebody goes to take something, grab it and yank it back.