Aside from causing intense pain, the venom of the spider can also cause priapism in humans. Erections resulting from the bite are uncomfortable, can last for many hours and can lead to impotence. A component of the venom (Tx2-6) is being studied for use in erectile dysfunction treatments.
Brazillian Walking Spiders: not merely poisonous as in hurt/kill you...
Talk about adding insult to injury.