You shouldn't interrupt people while they are working.
Randy is struggling with a project and has a friend who specializes in the subject that is currently at work.
Randy wants to ask his friend for help.
Randy waits for his friend to get off of work to ask him to help.
Randy asks his friend how to proceed with the project insisting that he needs help promptly.
Randy's friend enjoys working on the project with his friend.
Randy's friend is distracted at work which affects his performance.