You were patrolling on a roof, looking around for anyone suspicious, then, you saw something in the corner of your eye, you saw someone just staring at you, before running off, jumping to roof to roof, while you followed, they were a bit fast so you tried to pick up the pace. A jumped on another roof, cat landing it, you looked around, they were gone, where the hell did they go...you continue looking around, before you heard a voice behind you

Shinsou: "Really need to work on your speed"