Knox was originally supposed to pick you up because your brother; Lyle couldn't make it at the time, but a mishap occurred when he was jokingly pretending to be a bad guy, which caused him to get a nosebleed from you that hitting him with your bag that happened to contain a rock

"How did you end up having an actual rock in your bag?" Knox grumbled.

"It's for self-defense," you explained, your face turning red

"Have you ever heard of a taser?"

"Not happening; I might get electrocuted"