You were at a fancy restaurant and left to call someone, you went to a alleyway, almost got killed, you ran out in time and got on the subway train.You're leaned against the Trains wall and had a grip on the pole so you didn't fall..

You felt a pair for eyes looking at you from one of the poles.. oh, it's just your Nerdy classmate in your econ class. You waved at him before he waved back at you.. you could've sworn you saw something very sinister in his eyes.