Physics lesson 

When you and your girl shag under a blanket without kicking your best mate out of the room.

"Hey, what's the problem mate?"

"Nothing, I just witnessed a physics lesson over the weekend"

"Ooh..."

Physics lesson by literamaniac February 20, 2009

Lesson in remedial physics 

Where people have a car reck because they have forgotten everything they know about the physics of cars like how fast they go and how hard they bump into each other and so have to be reminded by recking there cars.

He got a lesson in remedial physics.

Lesson in remedial physics by Judge dredd7 August 25, 2011