This is crazy. It's not a natural sinkhole, though. This bad boy is man-mad. From Mother Jones:

What happened in Bayou Corne, as near as anyone can tell, is that one of
the salt caverns Texas Brine hollowed out—a mine dubbed Oxy3—collapsed.
The sinkhole initially spanned about an acre. Today it covers more than
24 acres and is an estimated 750 feet deep. It subsists on a diet of
swamp life and cypress trees, which it occasionally swallows whole. It
celebrated its first birthday recently, and like most one-year-olds, it
is both growing and prone to uncontrollable burps, in which a noxious
brew of crude oil and rotten debris bubbles to the surface. But the
biggest danger is invisible; the collapse unlocked tens of millions of
cubic feet of explosive gases, which have seeped into the aquifer and
wafted up to the community.

At first, the trees in the video are moving so slowly that I couldn't actually tell anything was happening... but then it sped up. Big time. Enjoy.