These are not the most informative or educational videos you'll see today but guaranteed they are the cutest: dogs, cats, bears, birds, rodents and others animals losing their critter marbles and 'performing' along with death metal acts like Slayer, Opeth, Vital Remains, Exodus and more.
We're not exactly sure how this collection of homemade videos came to be but we're very glad the brain-trust over at Loudwire.com decided to group them together for our viewing pleasure.
Gathered here are some of the best, including an adorable puppy that snarls when music the plays, a nutty cat, a 'head-banging' bear and a startled hamster. Yup, good times. Enjoy!