Or the biologist is Emma, Stan's ex, and Alex chased Stan in her favorite park - the one he didn't want to go to. Maybe he didn't want to go there, because he's been chased before, and the biologist, possibly Emma, got a Medusa-tattoo because she was saved by a giant snake?

But honestly, he might have done you a favour. It's not like you can report anything to anyone anyways. "He got lost in the woods" sounds far more plausible than "He got eaten by an ancient mythological creature from the Nordic countries" and quite frankly, from the first part of your story, the world's probably better off without Stan. I hope you're doing well though!

Oh that is... Clever. You wouldn't even notice, if you're not either Scandinavian or Icelandic. Alex IS the snake. His last name is Lindorm, a Lindorm is a huge, man-eating snake in old Nordic mythology. When you stumbled out of the woods, you heard the rangers talking. What did one of them say? "I'm fine, I just ate something that doesn't agree with me". What if that ranger was Alex and the thing he ate was Stan? I mean, he obviously doesn't agree with Stan as a hwole. He talks about his own friend, what if he ate her boyfriend too? Next time you stop by, give him an extra thank you.