You shouldn't be late to work.
Bruce hates getting up in the morning to go to his job working on an assembly line.
Bruce wants to sleep as long as possible.
Bruce calculates the exact amount of time he needs to get ready and travel and sets his alarm clock accordingly.
Bruce goes back to sleep after his alarm goes off and wakes up at the time his shift should start.
Bruce makes it to work right on time replacing someone who is happy to go home.
The person Bruce is taking over for is angry when Bruce arrives because he's getting off late.