I really think this way
C: You woke up and started surfing, and now you're not only not early, you're in danger of being late! Sometimes I think you don't know the meaning of self-discipline.
M: That gives me an image of wearing leather and a whip. Yuck.
C: [appalled] You really don't know what self-discipline is!
P.S. I did make my usual train, so it wasn't that bad.