Special thanks to toonanimals317 for this request. Hope this one is good, too.

Before their vision cleared Sam and Dean could feel the hard ground and prickly plants beneath them. When their vision did clear they could see that there were tangled up in the brush if a forest floor. They quickly started to untangled themselves, making a whole lot of noise in the process.

When they heard a female voice they didn't recognize say, "Hey, I think I hear something," they froze in their tracks. "Do you-" The female's voice began again.

"Yeah, I do," A voice they recognized as belonging to Dean replied, "Two humans. And is it just me, or do they-"

"Yeah, they do," A voice they recognized as Sam's said, "That's -weird, man."

"We can't have any unexpected surprises, there's too much at stake," The female voice said, "Sam, go check it out."

They heard rustling through the trees and renewed their struggle to get free, Dean actually managing to stand up, and go over to Sam to help get a tree limb off of him.

They had barely gotten free when that universe's Sam appeared through the trees. He started at the two for a moment shock then got a look of pain on his face, closing his eyes. The pair watched in horror as claws grew from that Sam's hands, fangs appeared in his mouth as he screamed and when he opened his eyes, they had turned yellow. Then he leaned back his head and let out a long, loud, eerie howl.