NMIXX's Sullyoon is seen shaking in fear during a performance due to her intense fear of heights

NMIXX's Sullyoon is gaining attention for her bravery during a performance today.

On November 29, NMIXX kicked off their 'ZERO FRONTIER' world tour in Incheon. With an extensive setlist and thrilling performances, NMIXX got the tour off to a strong start.

However, member Sullyoon is standing out in particular for her bravery during the concert. During one part of the show, Sullyoon is seen standing on a high platform and trembling severely - leading many to speculate that she has an intense fear of heights.

Despite Sullyoon's fear, she is receiving praise for fighting to overcome it during her performance. Fans are complimenting Sullyoon on her efforts to hide her shaking hands and continue the performance with a calm appearance. Others are questioning the need for high platforms to be involved in NMIXX's concert tour, if it was known ahead of time that a member has a fear of heights.

After the concert, Sullyoon revealed on Bubble that she does in fact have a fear of heights - saying that even though the lifted platform was very high, she declined the company's offer to lower it for the concert because she felt the energy would be better this way. Sullyoon commented, "Among all the lifts we've used on stage, this one was the safest ㅋㅋㅋㅋ but I guess my fear still showed..."