MBLAQ’s G.O. made a surprising confession that he has a particular sleeping disorder.

On July 16, he made an appearance on the summer special of MBC Music’s idol ranking show “All the K-Pop.” In one corner, the emcees asked that members to reveal each member’s old habits and G.O. shared, “I have narcolepsy.”

He explains that it is a disorder that causes one to suddenly fall asleep outside of his control. He continued, “There were times that I would suddenly fall asleep while singing or listening to music.” The members inserted, “There was a time when he suddenly fell asleep during a performance while singing the high notes in a song.”

Meanwhile, comedian Song Eun Yi recently revealed through SBS’s variety talk show “Go Show” that she also has the disorder. She unfortunately experienced a time when she suddenly fell asleep during a live broadcast.