Yeah they are sneaky little critters. Though the Widow is really bad with its neurotoxic venom, the one I would kill on site is a brown recluse. They are nasty and can jump like Jordan as you put it, and will not hesitate to bite. That is a nasty venom they have, and is necrotic in its effect. My friends grandpa got hit by a recluse and 1/4 size chunks were falling out of his arm the next day