Kyle rode to the park. It was a nice place, with a playground, a small pond, and some hills.
He spotted a guy, hid behind a tree, and wispered, "Transform or Dare?"
The guy continued to toss stones into the lake, not noticing the kid creeping behind him.
"For your dare, you will hide in the tree that Jen always sits under until she arrives, and for your transform, you will turn into a cow."
The man got up, walked to another hill, and started shimmying up the tree. Laying on a low branch, he starts to change. He gets larger, fur sprouting all over his body. Hooves form, and horns grow from his now bovine head. His udder grows in, splaying over the sides of the now creaking branch. The trap was set.
Jen left her car, with Emily and Kelly at her sides. Sara was last to get out, but was still close behind. Kyle glanced at his watch. Sara has about ten more minutes to enjoy her arms... and her life.