To say that the Rider wasn't used to being disturbed was an understatement. There was the instance with the Punisher, but he used bullets rather than words. Oddly, they both ended up uneasy allies after that. Those X-Men he'd blown by didn't count. They never even interacted. Humans certainly didn't interrupt him, given the intimidating image he presented. Besides, they were very rarely on rooftops, especially at night.
So to say the shout of, "Hey! You!" got his his attention was an understatement. He'd been in midair when he heard it, jumping his Hellcycle from one rooftop to the next. Nailing the landing, he continued forward about five feet, enough to give whoever was following him room to land, and then abruptly swerved the cycle and brought it to a stop, planting his booted feet on the ground and leaning on one to keep balanced. He turned his flaming, fleshless skull in the direction the shout came from. He didn't reply to the shout, considering his halt enough of an acknowledgment for now.
The chain didn't move. He wasn't sure if this was a potential friend or foe, and wouldn't draw his weapon until he was certain.