"I know," exclaimed the child, "how about paper-scissors-rock!" Janet had always hated that game, but it took just one look into the boy's glowing face to make her decision.
"You're on!"
Within an instant, they were both ready to start. Janet already knew what she'd pick - what she always picked - and as they began she held her hand out in a tight fist. The boy, hand outstretched and palm open, was ecstatic.
"Wow, I've never won before! Too bad for you though."
The kid wore an almost sadistic grin, but Janet just assumed it was her imagination. She reached out her hand to shake his in congratulations... but found that it was still in a fist. Even with all the force she could muster, it was too stiff to move. She reached over with her other hand to try and pry the fist open, but found the skin to be incredibly solid and cool to the touch.
"You know, you aren't very bright, lady," said the boy, that sadistic grin of his stretching from ear to ear as Janet struggled against a stiffness that had begun to crawl up her arm. "Most people at least suspect something when they come across a kid just sitting in the woods, but not you. You've got to be the most gullible person I've ever met." The boy's body had started to stretch, his arms becoming longer, his legs nimbler, and his still-youthful face older. All the while, Janet struggled to even move as the stiffness spread throughout her, paralyzing her. "Oh, but bravo," the boy-turned-man continued, that grin now contorting his entire face into an image of playful malice, "You've certainly managed to entertain! Really, I did enjoy our little game! But enough of that - I've got the whole night ahead of me. Ta!"
As she watched the young man walk away, Janet's consciousness began to fade. A single tear rolled down her cheek as the last of her body and mind were petrified, left as a little more than a monument to the Loki's twisted sense of humor.