Misguided guy claims to have eaten 400 Tic-Tacs a day and gained 40 lbs: '[I] didn't realize that Tic-Tacs weren't actually 0 calories'

Yeah, this happens all the time and in more ways than we probably realize. And I'm not saying this in a “Wake up, Sheeple, you're being lied to,” kind of way; I more just mean that if something is too good to be true, it probably is. 

Nutritional information on the back of food packaging is one of them. Unsurprisingly, there are certain strict rules around what you have to put on your packaging. But as long as you follow those rules, it doesn't really matter what you put on there. You could say you bend the truth a little bit to make your product seem more appealing. This is why things like spray butter have “0 calories per spray,”  but that's because what they define as a “spray” doesn't meet the minimum requirement for needing to list the calories on the package. But if you just pause for just a moment and reason this through and look past the number on the package, common sense prevails. It's butter, dude… Pure fat, probably with salt added; there's no way you can just get away with heaping massive amounts of it on your food, and your body is going to just go, “JK, it doesn't count, dude, because there's a 0 on the packaging." As commenters in this thread have also pointed out, you're never going to have a good time if you consume 400 of something daily.