Also...
1. Hop into a trolley, get a friend to ram you into the shelves and push you into people with the excuse 'I'm blind, she's a cripple. We fell in love as soon as I jumped her in the alley with a knife and broke her legs with a baseball bat. Then when I was sleeping she dragged herself to bed, chained me to it and forced me to play the original Mine-Craft.'
2. Race through the store, knock over people, check apples/figs at random people (including the staff) and then open up the biggest container of Nutella, dig your hand into it and start scoffing it down. Then when the staff come to escort you out, climb on a shelf, run on the top and then when they get ahead, jump on them. (WARNING!!! You will most likely be put into a mental institution). xD
3. Get a fake light sabor, get a Darth Vader helmet and run around the store pretending to slice off peoples limbs and such, go next to a cash register and start to fill it with gumballs, run away and pull down your pants!!! :D
Three easy steps to getting booted/banned/getting into trouble/becoming a member of the most horrible mental institution. :P