I had a great science teacher in the seventh grade who made a bunch of very memorable comparisons exactly like that one, so it stuck with me.
Another one that stuck with me is this one:
1 glass of whole milk = the amount of fat in a McDonald's hamburger
I have a family member who teaches Biochem, and one of the labs she used to do was to extract the fat from Cheez It's. What's left is gnarly blob of fat dyed a that-doesn't-occur-in-nature orange. Also one of those things that sticks with you.
Fat is normal part of our diet just like carbs and protein, but most of us here in the States are already consuming enough of it without the addition of things like McDonalds, Taco Bell, and other forms of fast food.
As for the story, I agree we won't know for sure what happened to the kid exactly, but it is difficult to see this happening without some kind of pre-existing condition. Being a teenager is often synonymous with doing stupid things multiple times a day(although some people do find a way to prolong that for a while afterwards), and yet most of them survive to adulthood.
Do not meddle in the affairs of archers, for they are subtle and you won't hear them coming.