This is a highly amusing 70s "when the Ozone Layer depletes and Animals Attack!" disaster flick that should appeal to anyone who likes these kinds of movies. It has a fun cast featuring the incomparable Ruth Roman, the slightly-daft-but-that's-why-we-love-her Lynda Day George, Andrew Stevens when he was still somewhat humpy, and Leslie Neilsen in a straight-faced role like you've never seen him before...and never want to see him again. You've got all the expected plot elements here: the group disagreeing and splitting up, the one dude who gets fed up and goes bonkers, slo-mo death shots, and lots of faux animal action! Highlights include jumping rats and Nielsen dancing with a grizzly.

The earth's diminishing ozone layer is affecting the animal life in a very negative way and a few hikers are in real trouble.

Well, after reading countless reviews here and elsewhere stating that the animal attacks are laughable, I find myself in the minority group that actually was quite impressed at how the filmmakers managed to pull them off. They don't occupy much of the screen time but when they happen; well, I was impressed. Bear in mind that this is a low-budget feature film from a specialized B-movie filmmaker who used his wits and drive instead of money. As such I was very impressed with the end result.

The story here ain't much to write home about. Basically the hikers gradually learn that the animals look extremely mad and before long they're fighting for their lives.

The cast is good, a nice assembly of B-movie actors; Christopher and Linda Day George are always appealing and Leslie Nielsen really chews up the scenery as the crazy ad exec who takes on a giant bear.

The film is stretched and not much happens for quite a while but it's strangely atmospheric in a way and climaxes with some impressive stand-offs against the animals (again, I believe I represent the minority here).

William Girdler was a master copycat filmmaker, taking into account what was captivating to audiences and making a film on that subject while it was still fresh. The diminishing ozone layer was a hot topic in those days and he concocted a really neat little film (which looks much more expensive than it really was with that Panavision framing and impressive cinematography) that entertains without doing too much damage to our brains.

I first saw this as a kid in the late 80s.

Revisited it recently.

This one aint that gory like Grizzly but has lots of animals going berserk.

Mountain cats, eagles, snakes, rats, wolves, vultures and lots of dogs mayhem.

The movie has one of the most convenient n annoying ending apart from the lack of kills or gore.

Well, the best part is Leslie Nielsen going shirtless n pure bonkers.

Man, he wrestles a grizzly bear, he impales a fella merely by his walking stick, he is nasty, misogynist n pure psycho.

I dont remember his decapitation scene, whether it was onscreen or offscreen whe n i saw this as a kid but the version i saw recently, it is offscreen.

Whereas Wikipedia states that his head is devoured by the bear. Ain't that a sight to enjoy knowing that the victim is a rapist.