My tenant comes across as a nice intelligent reliable guy, always pays his rent and is usually quiet, never having friends over. I don't' think things have gone quite his way this year as is normal for someone in their mid 20's. About 3 months ago I heard him cursing and swearing loudly, yelling his frustration. He was living with his girlfriend at the time and I assume she was there but heard no sound in response. I sent him an email the next day to ask if he was ok as he sounded really upset. He wrote back and apologized, said he was embarrassed and it would never happen again. Since then I have heard him yelling in anger or frustration at least every other day. His girlfriend got a job overseas and he plans to visit her when his course is done in Dec(2 months from now). How much anger is abnormal? If he wasn't moving out I would probably want him to move as it scares me, although I am at no risk. Should I be concerned that he is going to flip out? What should I do to help him? I can't approach him and writing wouldn't be very effective. The only contact info I have for anyone else is an old boss. Any ideas?