The context of the following conversation is Cameron was helping Jan move to another residence. Cameron moved Jan's furniture.:
Cameron says I'm shattered after yesterday..
The friend responds What were you doing?..
Cameron responds I was helping Jan move house, she has a lot of stuff!..
The friend responds Was there a lot of heavy lifting involved..
Cameron responds You know it, my back is in pieces..
The friend responds ouch! Remember to lift with your knees next time..