On the July 8 installment of SBS's 'Magic Eye,' Lee Hyori brought up her past days in girl group Fin.K.L while the cast members were discussing anger. 

She said, "During my Fin.K.L days in the past, I had a habit of relieving my anger on my body.  At the time, there were a lot of our anti fans that were fans of H.O.T and Sechskies."  It was hard for her to govern her anger because of the antis' behaviors, so she developed a habit of biting the inside of her mouth really hard.

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"The inside of my mouth got swollen because I bit them too hard.  Whenever I ate, that part was so swollen that it would keep getting in the way," she explained.  She also brought up what happened during a fan signing event, saying, "At the time, the fans were lined up to get our signatures.  One fan came up to me when it was her turn, so I asked for her name.  She said it was Lee Hyori.  I just wrote her name as Lee Hyori.  Then, the fan threw an egg at my face.  I didn't know what to do in that situation.  I couldn't show my anger."