The venom (poison) of boomslangs disrupts the clotting of your blood, and this can kill you. After a bite, you can sometimes feel a headache, nausea and sleepiness. If you think you may have been bitten by a boomslang, you should get an antidote. This does not happen often, as boomslangs only bite humans when they feel attacked. This snake can make you bleed from all the holes in your body including your hair pores.