Get boxes of condoms and randomly put them in people's carts
when they don't realize it.

Set all the alarm clocks to go off at ten minute
intervals throughout the day.

Try on bras on top of your clothes.

Walk up to an employee and tell him/her in an official tone
"I think we've got a code 3 in housewares," and see what happens

Tune all the radios to obnoxious stations;
then turn them all off and turn the volumes to 10.

Re-dress the mannequins as you see fit.

Test the fishing rods and see what you can
"catch" from the other aisles.

Put M & M's on layaway.

Move "Caution: wet floor" signs to the carpet.

Nonchalantly "test" the brushes and combs in cosmetics.

Look right into the security camera and use it as a mirror
for picking your nose.

Take up an entire aisle in toys by setting up
a miniature battlefield with GI Joes vs. X-Men.

Switch the men's and women's signs on the restrooms.

Dart around suspiciously while humming the theme from
"Mission Impossible."

Set up a "valet parking" sign at the front door.

In the auto department, practice your Madonna look with the funnels.

Hide in the clothing racks and when people browse through
say things like "pick me pick me" and scare them into believing
that the clothes are talking to them.

Go to an empty checkout line and try to check people out.

Drag a lounge chair on display over to the magazines and relax.

If the store has a food court, buy a soft drink. Explain that
you don't get out much and ask if they will put a little umbrella in it.