For all the people going "eww, that's gross"... sorry, but what the fuck do you think happens to people that rapidly lose weight?
The skin doesn't magically disappear... they've got all the skin from when they were fat, and it takes a fair bit of time for it to actually be reabsorbed. A heck of a lot longer if the fat is just removed via something like liposuction.
That being said, the guy would have been pretty muscular underneath, just to carry around all that weight. Getting the excess skin cut off was definitely a good idea, and it shows in that last pic.
Now, if he'd had all that excess skin made into leather and sold it as a suit on eBay, that'd have been gross... and profitable.