"...your tail will grow," Kyle said.
"My... my what?!" Jen screamed.
"Your tail. As soon as I hang up, you'll grow a 3-inch long snake tail. Each lie you tell will make it double in length. As soon as it reaches 32 feet long, it will absorb your legs, meaning you'll have to slither around like a snake thereafter. Better get those pedicures while you can, you lying bitch! Also, no one will think it's weird that you have a snake tail except you. They may not remember you always having it, but they'll accept that you can't change it, and that you can't really wear pants anymore. Also I dare you to never use the curse to get rid of your new tail. Have fun, bitch!"
*Click*
Jen stood there flabbergasted. She couldn't believe that little twerp had such sadistic ideas. The curse couldn't be real, she thought, until she was snapped out of her stupor by a strange tingling sensation at the base of her spine. She felt bones deep in her pelvis shift and grow, and felt it twitch. She reached behind herself and screamed when she touched the cold appendage; she had a 3-inch-long snake tail, just like Kyle said!
"Oh, I'll kill that boy!" she screamed, causing it to tingle again: it was now 6 inches long.
"Fuck! Ok, ok, keep calm Jen," she calmed herself down, stuffing the tail between her asscheeks so as to hide it from view. She then put on the rest of her clothes and rushed downstairs, eager to reach the door before her mom noticed.
"Good morning, Jen," she heard her Mom say behind her, just as she reached the door. "Did you do your homework last night?"
"Oh yeah, I did! It was easy too!"
"Really? I could've sworn I heard you gossiping with your friend on the phone..."
"No, we were just, uh, helping each other study!"
"M-hmm. Well, have a good day at school!"
"Thank you," Jen said, bolting out the door. She soon stopped, however, as she was overwhelmed by the sensation of her tail growing. First increment: a foot, then 2, then 4, all the way up to 8 feet long. It ripped her pants clean off, much to her embarrassment, and dragged on ground. Jen began to cry, not noticing her bus drive past until it was too late...
--
Jen's tail is now 8 feet (2.4m) long.