There are a few giveaways. I questioned it when I first looked so I zoomed and look at the part of a gator next to/behind the one he’s kicking. The one behind him has a strange arm/appendage connected to their bottom jaw, the strange “porelessness” of the image is almost always a giveaway to me—or at least it’s what prompts me to look closer.

And look at the guy’s weirdly short feet, the oddly small hands, etc.

Usually if you look at the hands something will look off

This image is much older than AI images. Dude is just making up bullshit.