.Put condoms in other peoples' carts and follow them to the checkout and watch their expressions when they discover what was in their cart
.Go to a multiplex cinema and see how many movies you can go to on one ticket before you get kicked out
.Secretly rip out the last page of a book your friend is reading, but leave a note indicating where they can find it. NO DON'T DO THIS LOL
.Sneakily get the eggs from someone's refrigerator and hard-boil them all. Then put them back where you found them.
."Borrow" an ugly ornament from your neighbor's yard - see how long it takes them to notice
.Dress up really weird and walk around the block waving to people you have never seen
.Sit in a large cardboard box on the side of the road with a sign that says, "Why lie? I need a BEER!!"
.Climb into a window display and pose
.Hide in the clothes racks, and when people walk by, or browse at the racks, change your voice and say "buy me", "pick me" or something of that sort
.Hum the "Mission I mpossible" theme loudly in a retail store