Good nature
Just as an antidote to all the scary stories here. I consumed a field of magic mushrooms, tripped and fell asleep. I woke up the next morning frozen to what I assumed was an alarm clock going ba ba ba. There was a circle of about ten lambs taking turns to jump over my chest and then queuing up to have another jump. My wrecked body was an ovine playground. They scarpered when I sat up, but it was just so cute it turned me vegetarian.
In retrospect the weirdest thing is that they queued - how British is that?
Just before or just after that I took mushrooms and saw a house spider do something amazing. It was hanging by a thread on my stairs and all eight of its legs were in a blur of motion so it looked like a ball. My friend saw it too, scared us silly, made us think it was a deity. Never killed a spider since.
I was in a field of cows that knew me with an american girlfriend who was terrified of them advancing on her. I told her, "Don't flinch, they are more scared of you than you are of them". Arguably the stupidest thing I've ever said, we had to run for it.