Steal the Supermarket

Fill your pockets and walk out before the Owner grabs you. The more you grab, the more your pockets bulge — slower, and easier to spot. That yellow sack on your back gives you away down the whole aisle. One of you is THE OWNER: huge, slow, and you can hear him coming. Catch a thief and he picks them up and throws them out the door. Everything they stole spills on the floor — anyone can grab it. How much can you carry out before you go flying?