You shouldn't work so much that you injure yourself.
One of Dustin's cars recently broke down.
Dustin wants to repair his car.
Dustin spends a few hours every day working to fix his car.
Dustin spends all day, and all night working to try to fix the car.
Dustin finishes fixing the car by the end of the week and it runs better than it did before it broke down.
That night due to being tired Dustin accidentally kicks the jack causing the car to fall and crush his toes.