You wake up on the forest floor. Your vision still seems strange and you rub your eyes, but something doesn't feel right. You sit up then suddenly realize something is very wrong: you are still rubbing your eyes despite also having just used your arms to push yourself up. You look down at your hands and are shocked to find you have six of them! While you were unconcious, two additional pairs of arms have grown from your sides! Looking over your body, you find that much of your skin is now smooth, hairless, and black like a black widow. It reminds you of a latex bodysuit, but the texture is a little different. Only your hands, feet, and head seem to have retained their normal human skin. The changes have made your breasts quite pert and given you a flat stomach that models would envy.
You notice a large red hourglass on your stomach and remember that it was a black widow spider that bit you. Feeling your teeth with your tongue you find your top canines seem longer and you suspect you now have a poisonous bite.
You feel your face again and it determine that you now have four eyes instead of two. You vaguely remember spiders having extra eyes. You are thankful that you have normal eyelids over your extra eyes. This explains your vision problems. Details seem less crisp, but your depth perception seems better.
Standing up, you consider your options. The pain has stopped and you suspect your changes are over. You begin to worry how people will react to your new form. Then you realize you first have to find your way out of the forest again. You are unsure if you should put your clothes back on; your shirt certainly wont fit anymore. To anyone you encounter you will probably appear to be wearing a bodysuit rather than being naked. You deciede to gather your clothes up and carry them with you just in case.
You make your best guess about the direction you came from and start off through the forest. The hour seems to be getting late so maybe you hope you can find your way out before dark.