When a guy gets out a guitar and plays it staring into your eyes whether or not you were talking to him in the first place.
He doesn't even have to be good but he clearly wants to show off that he can play the guitar.
"omg so weird did you see that guy over there just started playing the guitar idk why he was staring at me the whole time"
"Ha you just got barbied"
"wtf it was so strange idek him"
"did that guy just try to barbie me?"
"yeah idk why he started playing the guitar at you like that"