Venomous Spider Bite. They attack quickly and generally do not hang on to the prey in MOST cases. (Unless they are a birdeater. Ever seen one of those mofos!? Yikes)
Being Blind or Crippled Physically?
(I know I already JUST did one, but after seeing that I had too. Especially to correct them. Sorry!)
WARNING: This picture is of a spider...It is one of the species of Bird Eaters. Yes there is a bird being eaten...