SEE ALSO: Seoul Philharmonic Orchestra reveals dramatic MV for Red Velvet's 'Psycho'

On the April 1st show, Irene was introducing KNK's stage when she suddenly fell to the floor in pain. As it was a live broadcast, Park Bo Gum was visibly shocked, not knowing what to do. He put a hand on Irene's shoulder and attempted to remain calm.



However, Irene then stood up suddenly, saying, "It was a joke. Today's April Fool's Day, so there will be a lot of people who play cute pranks like me. You know you shouldn't do anything too harsh, right? Bo Gum, you were shocked, right?"

Were you fooled?