Two guys are on a plane. One of the guys' name is Jack. The other is Peter.
Peter: "Hi Jack."
Flight Attendant: "You're going to hijack the plane?!?"
Jack: "No, my name is Ja-"
Flight Attendant: "Everybody stay calm! These two men are going to hijack the plane!"
Jack: "No, no. My name is Jack and my friend here is an idiot."
Listen up, dummy! The joke is all about how the flight attendant misunderstands Peter greeting Jack by saying "Hi Jack." She thinks they're saying they're going to "hijack" the plane, which sounds the same. So, it's funny because of the misunderstanding and how quickly she jumps to conclusions, kinda like you do, smoothbrain.
