A vegan who brings his own pasta to restaurants flipped out when he was charged full-price for his dish and wasn't allowed to use a coupon.

Jack Litsky and his wife are vegans and bring their own pasta to restaurants to ensure what they're eating is 100 percent whole-grain, the man told columnist Karen Price Mueller at the New Jersey Star-Ledger.

The couple went to Monticello restaurant in NJ with friends, expecting a discount because they usually received one.

Instead, the couple was charged $24 per entree. They also weren't allowed to use a $50 coupon.

"(The owner) said, ‘You come here on a Saturday night and order a custom meal. I have to charge you extra,’" Litsky told the paper. "I said, ‘But you’ve already set the precedent where you charged me a lot less than that on several occasions,’ and she said that was the old manager’s decision and this was the new price."

The police were called, and Litsky said police threatened to arrest him for "theft of services."

But he decided to pay the bill.

The restaurant owner told the paper that Litsky was mistaken about receiving discounts in the past. They also refunded him $12.