What the?...

What is it you ask? I haven't got a clue. All I know is that I was standing in our kitchen, by the fridge. I looked outside and said,"What is on the screen?!" (The screen around our patio, not on the window above the kitchen sink.) I thought it was a huge spider, but upon closer examination I realized it wasn't. I don't know what kind of bug it is other than totally disgusting. It sat on there for quite awhile and then as quietly as it had come, it went away. It doesn't look like it has wings, but I didn't see this little fella walk along the screen. So I don't know if he jumped or got eaten or what. All I know is that it's nasty!