Jason wasn't sure how long he worked at the bag, lost in the rhythm he had sorely missed in the time he had be in prison. It was something he had done since he was a kid, a way to relax or to burn off the excess energy that he had almost always had.
He was so lost in the familiar rhythm of punches and jabs that he didn't even notice someone else entering the gym, despite the fact that he was normally much more aware of his surroundings than that. In fact, he didn't notice the presence until a voice called out to him. Startled, he spun, hands pulling closer into a tighter defensive position. When he finally saw the man standing there watching him, he forced himself to relax, consciously dropping his fists. The man was too far away to be an immediate threat, and plus, if he was interested in causing problems, chances were he wouldn't have announced his presence.
"Couldn't sleep," he answered with a shrug. Now that he was relaxing and was no longer focusing on the bag, he could feel the sting in his knuckles. Nothing was bleeding, but he was probably going to feel it tomorrow. Or well... Later today. "Thought I'd check out the gym. It's a couple of years since I've really been able to go a few rounds with a decent bag."