Like I said, I was expecting him to tenuki. But looking at it closely, I guess he was afraid of a sequence like below, which is rather annoying I must admit.
- Click Here To Show Diagram Code
[go]$$Wcm1 'a' and 'b' miai.
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . O O . . . . . . . . . . . . . |
$$ | . . . . X O . . O . . O O X . . . . . |
$$ | . . . X . X X . . , O X . X . X . O . |
$$ | . . . . . . . . . . O X . . . . X . . |
$$ | . . . . . . . . . . X X . . . . O O . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O O . . . |
$$ | . . . . . . . . . . . . . X . X . . . |
$$ | . . . X . . . . . , . . . . X , . . . |
$$ | . . . . . . . . . . . . X X O X . . . |
$$ | . . . . . . . . . . . . X O O O O . . |
$$ | . . . . . . . . . . . . X X O . . . . |
$$ | . . . . . . . . . . O . O O O X . . . |
$$ | . . X . . . . . . . . . . X . . . . . |
$$ | . . . X . . . . . , . O a X . X . . . |
$$ | . . . . . . X . . O . b X O 1 2 . . . |
$$ | . . . . . . . . . . . . 3 . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Anyway, I'm quite happy that I got sente where I don't think I should have, and now I'm using it to break up the left side. The short sequence I expect is:
- Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . O O . . . . . . . . . . . . . |
$$ | . . b . X O . . O . . O O X . . . . . |
$$ | . . . X . X X . . , O X . X . X . O . |
$$ | . . . . . . . . . . O X . . . . X . . |
$$ | . . . . . . . . . . X X . . . . O O . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O O . . . |
$$ | . . . . . . . . . . . . . X . X . . . |
$$ | . . 2 X . . . . . , . . . . X , . . . |
$$ | . . . . . . . . . . . . X X O X . . . |
$$ | . . 1 . . . . . . . . . X O O O O . . |
$$ | . . . . . . . . . . . . X X O . . . . |
$$ | . . a . . . . . . . O . O O O X . . . |
$$ | . . . . . . . . . . . . . X . . . . . |
$$ | . 3 c X . . . . . , . O . X . X . . . |
$$ | . . 4 . . . X . . O . . X O . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
With

at 'a' or 'b' depending on how much I want to push my luck. He could choose to be more aggressive with

but I have a feeling he won't be, and it's not disastrous for me if he is.
I'm approaching at

instead of 'a' in the diagram above for two reasons:
1) It's a more foreign move, so hopefully he's less comfortable handling it
2) If I approached at 'a' and he played 'c', I would be dissatisfied.