Well, maybe he suddenly realized they said "No mushrooms"...
DOMINO'S PIZZA MAN CAUGHT EATING TOPPINGS FROM PIZZA BEFORE DELIVERY
A Domino's delivery driver in Canada has been fired after eating some of the toppings off a pizza he was scheduled to deliver to a customer in Surrey, British Columbia. Footage of the feat was caught on camera in an elevator of the apartment complex he was delivering too, and shows the delivery person pull the pizza out of it's delivery bag and picking a handful of the toppings off and eating them.
The building's concierge saw this happening on the security feed and called the tenant to let him know what happened.
Domino's says the employee was fired and that he's reached out to the customer to apologize.