Definitely teachers. Having to teach and guide human beings who are impulsive and reckless by nature due to their still developing brain is not an easy feat. Endless patience and understanding is needed. Used to teach in a middle school and high school for three years before and my goodness, it was so difficult but also so fulfilling. It's something I'd probably never do again.
Stuntmen, and in extension yung mga extras na din. Risking their lives para hindi yung main actors yung gumawa ng mga delikadong scenes, or kahit yung mga eksenang alam mong di gagawin personally ng mga actors normally.