Grizzly bear having some fun rolling down a hill at Denali National Park in Alaska.

Cyclist stumbles upon a kangaroo zombie apocalypse while on a bike ride in Australia.

Transformers Optimus Prime birthday cake that actually transforms.

Didga the cat drops in at a skate park and tears it up.

Duck Army: Man trying to embarrass his girlfriend while shopping creates internet gold.

Screaming Marmot sounds like Mariah Carey when she used to be able to hit the high notes.