It's rude not to help your coworkers.
David is at work, and sees that a coworker is struggling to get his work done.
David wants the coworker to stop struggling so much.
David jumps in to assist his coworker, lightening his workload.
David runs and tells his boss that his coworker can't keep up.
David's coworker is very thrilled that his coworker cares so much.
David's boss comes out and yells at his coworker, making him even more stressed.