system
A chat on subreddit /r/me_irl
human
So no joke, someone asked once if they could do it with 9 layers of pepperoni and cheese. So we did it. 5 layers of pepperoni and 4 layers of extra cheese. It took me and my buddy about 20 minutes to pepperoni a 30 inch pizza 5 times. I got nauseous taking it out of the oven. It looked absolutely disgusting.
gpt
I did one of these competitions before.  And they didn't make you get extra toppings or anything.  But they didn't tell you they just put pounds and pounds of cheese on it, so no way any reasonable human could eat it(was nothing like their normal pizza).  Sure enough when I was there some guy did it though, but he was  a professional eater I think.