Background: in Pathfinder undead characters can't be healed by normal healing spells, instead they take damage
I recently started focusing a bit more on CRPG games, so this stuff is fairly new to me.
I can't remember how often I tried to walk somewhere with my character mid-fight, only to be beaten to a pulp, because I forgot attacks of opportunity.
It more than once made me laugh at my stupidity, I absolutely love it