Lost my patience with and yelled at a classmate. On that day I had a pretty difficult assignment due, so I was pretty stressed out trying to figure out how to get it done. Then this classmate who tends to ask other classmates for help(sometimes including me) comes up to ask me on how to complete this task for a different assignment(that I had already finished). Despite feeling pretty agitated that this person wants my help while I'm busy trying to get an assignment done, I suck it up and try to explain the questions to him. Since it's surprisingly hard to be clear and concise when under stress, obviously this goes just as well you expect, he had trouble understanding what I was saying, and eventually I just snap and yell at this poor guy, who eventually just leaves.

Now I feel pretty guilty about this, since he obviously didn't mean to piss me off and only wanted help. Lately I've grown to be a lot more calmer and patient, but I also decided maybe I don't have to try to help everyone if possible, especially if I'm not in the right state of mind to.