MBLAQ guest starred on July 16 broadcast of MBC's music idol chart show 'All the K-pop' and revealed each member's unusual habits. 

During the interview, the fans were surprised to find out that G.O. had narcolepsy (a disorder stemming from the brain's inability in regulating sleep-wake cycles).

The members shared, "G.O. has a habit of suddenly falling asleep before a song reaches its  fourth segment. He doesn't just fall asleep while listening to music, he also falls asleep when singing a high note."

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G.O. confirmed his unusual habit and said, "To be honest, I have narcolepsy. There are times other than singing or listening to music when I suddenly fall asleep."

The show lightened the mood by also revealing Lee Joon's habit of popping his joints and Seung Ho's habit of keeping his legs open. 

After hearing about G.O.'s surprise confession, the fans commented, "It must be hard for him", "Don't fall asleep during a live broadcast~", and "That's a plot twist."