A characteristic of pre-credit scenes in the horror genre is a character (seemingly a main character) who is killed quickly,
as a heralding "warning kill" of the antagonist.
Directors often expended a significant percentage of their films special effects budget on these bloody pre-credits forcing
low budget indie film directors to find innovative ways to match these CGI created gore soaked pre-credit spectacles.
Some less scrupulous indie directors, in their quest to save budget, skipped the special effects entirely...