Inspired by Not Always Right stories where customers attack with:
teeth, arms, shopping carts, animals, lightsabers, liver, coins, oranges, ice cream, chairs, nakedness, phones, sandwiches, shoe boxes, guitars
[Link to the image above]
And the final reason why dealing with customers is worse than a zombie apocalypse:
Disclaimer: Not all customers are bad. This comic is dedicated to the small, but vocal minority of customers that make surviving an undead cataclysm look like a walk in the park.