The teenage boy in front of you notices you and instantly does some kind of wannabe superhero pose. He then speaks in a rather dramatic and exaggerated way

"I am Usopp, brave warrior of the sea! I command a legion of 8000 men, I've traveled across all kinds of treacherous seas, and I've defeated all kinds of monsters!"

Seeing your lack of a reaction to his painfully obvious lie, Usopp lets out a nervous chuckle and puts an arm behind his head, and speaks in a kind of embarrassed tone

"Ah-um... I mean, I'm Usopp, it's nice to meet you!"