Leo
You were walking in school with a couple of your friends. The last bell had just rang, so you were almost running to get to your last class. Your friends said goodbye and ducked into various classrooms, like English on your right, and Math on your left.
Suddenly, the hallway was very empty. There were a few pieces of paper drifting down the hallway, and you couldn't help but feel a little nervous. You were completely alone, for the first time in several months. And it made you uneasy.
There was a squeak of shoes behind you, and you didn't hesitate, sprinting straight into your class, and slamming the door behind you. The class stared at you for a second, but since it was Drama, they just thought you were practicing for the upcoming play. You thanked whoever was watching over you that you hadn't been grabbed by whoever was following you. You'd have to tell Leo when you got home.

Raph
They say you never miss something until it's gone. For you, that meant that you missed riding your bike to school with your best friend. She had gotten sick, and you couldn't help but think of all the streets and ally's you had to go through to get to school.
The streets were silent, the cars parked on the sides of the street sitting still. The ally you were passing through was deadly quiet, a slight breeze blowing through. It was the darkest one you had to pass through, light barely there because of the buildings on either side of you. There was a loud clang behind you, and with a shriek, you took off, getting to school in a record time of four minutes.
Breathing heavily, you chained your bike up, looking over your shoulder uneasily. You were so telling Raph when you got home. You felt a little stalked to be honest.

Donnie
You were struggling to finish up your science test before the bell rang. You only had a few questions left, but then again, you only had three minutes left of class.
You finished right after the bell rang, and ran to turn your paper into the basket on the desk (you had a sub and he left already). You hunted around on the ground for your pencil, as the remnants of the class left. Finally, you found it, and you zipped up your backpack.
You ran into the hallway, and walked fast to the bus loop, praying you didn't miss the bus. Your ears picked up a slight misstep behind you. Someone was following you. Not hesitating, you broke into a run, sprinting for your bus. You got onto the bus, and managed to say that you thought you were going to miss the bus to your friends.
Donnie was hearing about this when you got home.

Mikey
You were walking home from school, having missed the bus because of a test. Your History teacher had threatened, joking of course, you with death if you didn't retake it to get a better grade.
You had finished just a few minutes ago, and were walking down an empty street. It was starting to creep you out how many people weren't out. You paused your music out of fear when you saw a shadow behind you. Now you could hear a slight scraping noise coming from behind you.
You broke into a run, heading for a spot that Mikey had showed you if you were ever being followed. It was a box that Donnie had designed that took you down into the sewers, but only if you had the password for the day. You hurriedly gave it, and closed the door, heading for the lair. Mikey was totally going to be hearing about this.