If there isn't something laying on the hog to show the scale, then I usually think it to be manipulated in some way to look bigger. I think everyone should lay an arm or their rifle over their kill when they take a picture of it so that it doesn't look faked. BTW, that's why I carry a tiny, toy gun with me.
I think this one is a big (400lb+) hog, raised in a pen, then released to be hunted, then photographed with the hunter and guides far enough behind it so that it looks much bigger. Ferals are dirty, usually pretty skinny, and their tusks are usually worn down.
And GB, if Ted Nugent can ride a buffalo, I think you should be able to ride a Hog.