I've been bit by a Brown Recluse. It's not fun. Ended up in the emergancy room hooked up to an IV and had to see poison specialist. I have a permanent scar on my arm from the bite. It only takes about 8 hours for the bite to start turning black. Black means dead skin cells. If you don't get to it quick enough it can lead to amputation. Had to take antibiotics that made me sick as shit. Needless to say I didn't have medical insurance so the fucking little bastard spider cost me a grand.
Spiders suck.