Spiders... I say basically all of them have to die...

Description: Brazilian wandering spiders' venom is a complex cocktail of toxins, proteins and peptides, according to the Natural History Museum in Karlsruhe, Germany. The venom affects ion channels and chemical receptors in victims' neuromuscular systems. After a human is bitten by one of these spiders, he or she may experience initial symptoms such as severe burning pain at the site of the bite, sweating and goosebumps, Sewlal said. Within 30 minutes, symptoms become systemic and include high or low blood pressure, fast or a slow heartbeat, nausea, abdominal cramping, hypothermia, vertigo, blurred vision, convulsions and excessive sweating associated with shock. People who are bitten by a Brazilian wandering spider should seek medical attention immediately. In addition to intense pain and possible medical complications, the bite of a Brazilian wandering spider can deliver a long, painful erection to human males. The venom boosts nitric oxide, a chemical that increases blood flow. Several studies have looked at incorporating the venom into drugs for erectile dysfunction. However, these bites are rare, and envenomations are usually mild, Vetter said. He cited a Brazilian study, published in the journal Revista do Instituto de Medicina Tropical de São Paulo in 2008, that revealed that only 2.3 percent of bites were treated with antivenin. (The other bites did not contain enough venom to require it.) The study also pointed out that, as of that year, only 10 deaths had ever been attributed to the spider's bite in Brazil. According to the study, "cases of serious envenomation are rare (0.5 percent)."