He merely grunted at the other boy. Of course he didn't mind, so long as his own training wasn't alienated in the slightest. If it was, well..... Alpha wouldn't hesitate to take this guy to the ring and blow off some steam on something that could actually feel his skill. Alpha shot him a glance during a particularly speedy left jab-right jab-right-left jab combo [than god for ambidexterity], noting his stance and a few of his punches. Obviously, this guy was no novice to combat. His stance wasn't quite a boxer's one, as Alpha's was, but nonetheless, the dark-skinned boy felt he'd be more than a match.
Hell, this stranger was probably better than he, the way he laid into the bag. As Alpha's last punch sent the bag to the end of the trolley [only a few inches, he was pulling his punches to finish these long combos], he stopped, looking over at the guy as he punched. Hmm....
Alpha glanced back at the bag he was currently engaged in, before staring at it. He stood stock still, as if he were trying to do something he wasn't used to doing. Alpha's teal eyes let off a sudden spark of bright blue electricity, before lightening until both of his entire eyes were a shining white. Power seemed to thrum from him, his form lightly vibrating as he focused on pure strength. As he breathed, the air in front of his face misted slightly. He watched the punching bag, before falling into stance, sending a powerful punch right into it's center.
The bag flew back, breaking off the chain and pouring sand out of it's split hide. He yelped, his eyes immediately snapping back to normal as well as his breath as he lost hold of the power he'd summoned. He looked around, as if he were going to be yelled at before coughing, quickly running over to assess the damage.....
"Uhhh..... Yea, I'm new... Alpha..." He sighed, sitting next to the bag and pinching the bridge of his nose. Hopefully.... He didn't have to pay for that.