Wow, that is SCARY!!! I just got back from Costa Rica and saw a huge spider in the bathroom but I don't think it was poisonous. I also saw a snake that I don't believe was poisonous either. Last but not the least, on our last day there I saw this black little frog with some green color marking on it....and I was thinking 'how cute', but the bell boy said that the frog was poisonous. Go figure...