The Spider that looks like a long legged ant

I was just sitting here in my Hot Tub (because my back hurts) and writing on my Macbook Pro laptop and I noticed what was either an ant or a spider. It took me some time to figure out what it was and the only thing that gave it away as a spider was when it crawled up an invisible line of webbing. So, I thought, "This ant is really a long legged spider. Then I noticed it's eyes extended from it's body too which is different from an ant which usually has eyes built into it's head exoskeleton. It's funny to observe things you never noticed before like this. I never thought about how similar ants and spiders can be in body structure that much before.