A US father fed up with his son's bad behaviour at school has taken the opportunity to embarrass him into behaving.
Bradley Howard, 17, had been getting into trouble for talking too much throughout his physics classes at high school in Houston.
His father, Brad, warned his son if they received another note from the teacher he would "sit up there with [him] in class".
It wasn't just an empty threat.
NBC 5 News reports Bradley walked into his physics class to find his dad waiting for him.
"His classmates seemed to love it, but Bradley... not so much," Brad said.
The teen's sister posted on a picture on Twitter of her father and her brother sitting in class.
"My dad told my brother if he got another call from the physics teacher complaining he would go sit in his class... dad got another call."
Twitter users were quick to respond, crediting the father's "spectacular parenting" method.