The sudden explosion pushed River down to his knee and immediate chaos was erupting all around him. Was someone going to rob the museum or were they trying to blow the place to pieces? No, if that was the case, he wouldn't be alive right now. Perhaps they had a target, and as far as River knew, Kitty was the most known figure among them. He struggled back to his feet, noticing some blood running down his side as he placed his hand over the wound. The explosion hadn't happened far off and debris had made its way towards him. Luckily it had only grazed River but the cut was bad enough to leave him wounded and bleeding. The pure shock of the event removed any pain for the moment, that would come later once he had landed in the situation. This was very bad, and he had no way of protecting himself. The biggest downside to River's power was that he needed a weapon to make full use of it, leaving him nearly useless right now. No, he [i]was[/i] useless right now, and damaged to top it off. 

River attempted to regain his composure, trying to find his classmates in the chaos. They were there, good. But what would happen now? They weren't exactly alone and the humans would blame them if they saw any power in display. Even trying to help those fools would leave the mutants in the spotlight of a police helicopter. River dropped against a wall, leaning to remove strain. Hopefully their teacher could handle things as to prevent stressed out, scared out of their minds mutants from exploding in powers. This really wasn't how this day had been pictured, and it wouldn't be nearly as bad if River had any means of protecting himself but for now, he'd just have to stay out of the way and let the others do what they could. 

Without much left to do, River started towards his classmates. They needed to stick together as much as they could or more casualties were waiting around the corner.