Today I discovered that you've gotta be careful when venting your frustration. An ongoing animation had me worried and frustrated, and I decided to silently curse with some arm gestures. I was not careful of my ferocity and I badly strained my right arm. It's not injured, but my, for a while I thought it was. My right arm, especially the uppermost joint, really hurt, and I broke out in sweat and feelings of nausea, already worried over how I was going to get to the hospital without a car on a Sunday afternoon.

Fortunately, I can feel that it's not so severe, but it still aches if I move it a certain way, a bad muscle after a bad stretch. So be careful out there, people who need their arms (especially their main one) to work.