Having that much fat pushing down on your chest all the time has gotta be uncomfortable 24/7 just to breathe. Not to mention claustrophobia-inducing. I imagine it would feel like one of those carnival rides that spins so fast that it pins you up against the wall. Even something as trivial and quick as getting out of bed - it takes less than a couple seconds for a normal person, but someone that size? They need a few minutes just to prop themselves up, gain the momentum to swing themself out of bed, and then lift up over 500 pounds of mass with their knees. Doing regular things like going to the store or the park would seem like gargantuan tasks when it needs so much effort and time alone to get out of the bed, get dressed, and bathe itself. There's no possible way to have an enjoyable life when you're that size. Everything takes 10x more effort. It must feel absolutely miserable, I'm so glad.