The little jumping spider did a 180 on the park bench, shrinking back when you placed your finger in front of it. GIANT FINGER.

Give it a second and it relaxed, reaching forward with it's little pedipalps to touch the finger and climb on. Its little butt wiggled as it looked around quickly and sped to the center of your palm. Its butt twitched a few more times and then it began secreting to make a little web on your hand.