Just like how every candidate was transported into the Stage, Aljier vanished in an instant and was sent out of the Stage by some unknown power. He didn't even have time to complain nor did he have time to apologize to his teammates about his shortcomings. It was a well-deserved disqualification though since he really didn't control his superpower back then.
Aljier was known to lose his cool, and there were times when he'd be disqualified in official matches, not just in inter-high tournaments. He was one of those rare candidates that got the oppportunity ever since he was a first-year and that somehow got in his head.