Laziness

A few days ago, I hurt myself with the armrest of the office chair. It was all my fault to have this incident. On that day, I dropped a pen on the floor. I should have stood up to pick it up, but I tried to reach for it while staying in the chair. I leaned over the armrest, and stretched my arm. At that time, I pushed my ribs to the armrest so hard that I managed to hurt my rib and something around there. Now, it hurts every time I raise my right arm. I should have been more careful about my act.