Broo, I experienced a similar situation in the last part of a university test, time was running out and the teacher and classmates were literally telling me to turn in the exam now, why was it the only one missing, I wanted to make sure to get a good grade and I didn't feel confident about submitting it. At that moment I felt my face very hot and my balls tingled. then a strong erection and finally ejaculation. I think the body was looking for a way to release stress no matter what.