Make your 'dog' relieve itself in the hallway.
From Create Your Own Story
You walk her down the hallway, her eyes flickering back and forth hoping that nobody decides to walk by while you are still leading her. You are bringing her to the bathrooms but you want to make her do something first, a test to see how bad you've really got her.
"What is it that owners walk their dog for? Exercise? God knows you need it fatso, but thats not it...oh yes. Cause dogs are too stupid to use a toilet they've got to do it outside." You smile while she looks up at you horrified. "Better let you do your business first."
You lead her up to a corner with lockers. "Okay, shit for me dog." She cries and starts to beg you to stop. Not good. You jerk up on the wire noose making her gag. "You think I'm joking with you bitch? You think you can bargin with me? Think again, now shit or they'll be finding your dead body here instead of your turds!" You release her and she gasps horribly for air, her face pink and shiny. She reaches for her panties.
"No! You don't get that now!" You say angrily. You thought you were further along than this. Crouching down in the corner she sticks her fat flabby ass out, her face skrunched up, forcing as hard as she can.
"I can't, I don't have anything..." she whines miserably. You make a quick violent jerk on the wire leash to teach her a lesson. She tries again, and this time a farting noise pops out and her panties get dark and heavy, squeezing gooey turds out onto the floor.
"Pee too!" You command.
"Please I don't..."
You stand behind her and wrap the wire around her, lifting her off her knees as you choke her. "PEE!" You yell, hoping no teachers hear you. She starts to turn purple and gurgle but then the wet splashing sound of urine wetting the floor sounds out. You step back as she tries to breath, her legs soaked with piss.
"All done?" You say maliciously. "Good lets go..." And you drag her off to the bathrooms.