The context of the following conversation is Addison wasn't paying much attention.  They got into a car accident.:
Addison says What happened to you last week Addison? I heard you were in a car crash?.
The friend responds I was yeah, thankfully not a bad one! No one was badly hurt..
Addison responds How did you crash?.
The friend responds It was my fault I was checking my phone whilst driving..
Addison responds You should be ashamed, you could have really hurt someone let alone yourself!.
The friend responds I know I feel awful, I'll never make that mistake again..