I put in an after hours bid of 47.20 on CCMP on Tuesday, and was surprised this morning to see it had executed. The ask was 47.40 at the time, so I went off and did something else, thinking it wouldn't execute. Took it off a few minutes ago for 48.65 (+1.45). I was about "due" for some luck with that one, although it still "owes" me a couple of bucks.