Fried Egg
How can something so simple be so disgusting? This fried-egg-pizza combination is initially repulsive, then intriguing ("Could I dip the crust in the yolk...?") and then repulsive again.
Happy Meal Pizza
Possibly the most calorific pizza ever photographed, this is a lesson in learning when to pull back from the brink of insanity. In short, this is a selection of McDonald's famous fat-kid snacks placed on a pizza base and covered in loads of cheese. That's it. The problem? We still might eat it.
Chocolate
Putting marshmallows and dark chocolate on a pizza might bring back pleasant memories of making s'mores at camp, but that won't last when you're throwing up in a bucket.
Japanese 'Mega Pizza'
This Pizza Hut monstrosity, exclusive to Japan, brings America to Asia. The crust is made of hot dogs wrapped in bacon and rolls of molten cheese. The center is built with hamburgers, cheese rolls, sausage, bacon, ham, bacon bits, mushroom, onion, pepper, garlic and tomato sauce. The pie also comes with two toppings -- ketchup and maple syrup -- and a world of shame once you're done.