CNBLUE's Jung Yong Hwa tells members to ”off” during the performance... What was the reason for stopping the performance?

It was reported yesterday that Jung Yong Hwa of the band CNBLUE responded proactively to an emergency situation that occurred during a performance, setting an example to society.
CNBLUE took to the stage at the Kyung Hee University Festival in Seoul on the evening of the 26th.
Jung Yong Hwa, who was singing enthusiastically, stopped playing and said, "Wait a moment."
This was because an emergency patient had been admitted to the stands. Jung Yong Hwa asked with a serious expression, "Are you OK?" and shouted to the surrounding spectators to "make way for us."
He yelled at the band members to turn it off and even removed his in-ears (earphones that are worn inside the ears for performers).
With the help of spectators in the stands, those experiencing worsening conditions were able to get out safely.
Jung Yong Hwa asked, "Is anyone else feeling unwell?
"If anyone wants to go outside, please say so now," he said, adding, "That kind of thing could happen if you suddenly find yourself in a crowded place."
He then handed water to the audience and said, "Everyone, this is not fan service.
I want those who are truly struggling to come forward," he emphasized.
Afterwards, Jeon Yong Hwa said, "I'll see how the situation goes.
Please maintain order so that no one gets hurt," he said, then rushed under the stage to check on the audience who had left the venue.
Kyung Hee University said, "An accident has occurred. We must be mindful of safety. Please leave more space between students. We will try to provide as much water as possible."
It's good to have fun, but if you're not healthy, you won't be able to enjoy it to the end.
Please enjoy safely," Naeun said.
After checking for symptoms, Jung Yong Hwa returned to the stage, saying, "I'm sorry for not being injured.
I can't. It really hurts my heart so much. I can see each and every one of you, so if it's too hard for you, please send me a sign right away," he said, before singing passionately for the remaining audience.