Why was Junsu missing when 2PM received K-Chart trophy?

On the recent episode of Music Bank on May 7th, 2PM edged out Rain and Lee Hyori to lay claim to the K-Chart trophy for Without U since making their return. Upon closer scrutiny, one would have noticed that Junsu was missing at the end as just five 2PM members took to the stage to receive the trophy although he did perform during Without U which was pre-recorded. It was revealed later that Junsu had complain of severe knee pain after the performance. He thus did not appear at the end and headed straight for a local hospital for treament after the broadcast ended. A JYPE representative revealed, "The x-rays showed no particular abnormality but we will arrange for a MRI scan soon. Junsu had hurt his knees two weeks ago during dance practice, so he might have overexerted himself during today's performance." We certainly hope he is "gonna be�ok"!