On September 27th, IU was attended 7080 Festival as a guest. When she's performing '너의 의미' there was one male fan run to the stage with excitement. Fortunately he's only look at her without doing anything further, & about 2 seconds later staff escort him off to the stage. IU looks a bit shocked but in the end she say thank you with a little laugh.
you can see the male fan on 3:53
video credit: uploader