Reaction to some situation

Do you have in some situation you are not liking as your coworker has given his work to do because he has to do something urgent. you want to deny coworker but stop..... just do your work and wait for 3 hours and try to do your work and if time permits his..and you will find either you take out time to do his work or your reaction will be minimize...and dont criticize anyone on others face never ,wait for 3 hours!!!!!!!!!!!!!!!!!!!!!!!!