Help with Lupin's boggart

[ladyramkin2000]

No: HPFGUIDX 97504

Carol wrote:
Why did Lupin "positively flee" unless he was afraid of his own 
future?

Sorry, but this seems to me an example of taking too seriously what 
is obviously meant as a light-hearted joke at Trelawney's expense.
The actual quote is "He positively flad when I offered to crystal 
gaze for him".  

Come on, Carol, wouldn't you positively flee if Trelawney tried to 
corner you and crystal gaze for you!  Lupin probably muttered 
something about an urgent appointment elsewhere and hurried off 
before she could pin him down.  He's a gentleman (and a gentle man) 
and is letting her down lightly.  I hate to think what Snape would 
have said if she tried it on him.

Sylvia