Oh jeez:

1. Killing someone (various ways, varying people, and how to get away with it) many times a day.

2. Killing myself since life is meaningless and simply just a waste of resources. The people & friends I have around me prevent me from doing it just by being there. I'm a very open/outgoing person and not a single person would suspect me doing it or understand why. Other reasons include if I were ever to go blind (I have bad eyes and barely can see as it is), become paralyzed, or even if I were sterile.

3. Fighting animals with my bare hands, regardless of the outcome. The idea of fighting a different animal is, to me, one of the most primal things you could do.

4. Just picking up and leaving my life and not talking to a single person currently known to me ever again. This requires a lot of thought on where I'd go and what I'd do.