They've learned how to feign death. I was swatting one yesterday and I got him into the death-trap (up against the window) and I took a light smack at him, and he fell like Liedson. He just laid there, upside down. I took a few steps back and the bastard darted off again, but then I swatted him again and made him one with the wall. So watch-out, these bastards are getting smarter.