IMO, it's fairly normal for therapists to think about their clients if they're in a situation that brings a particular client to mind.
R has mentioned this to me on a couple of occasions.
The treadmill thing...now that's a boundary issue.
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'Somewhere up above the great divide
Where the sky is wide, and the clouds are few
A man can see his way clear to the light
'You have all the grace you need for today, and today is all that matters.' - Steve Austin