Wasn't it Jonathan Silverlight who wrote:

In message <rcDcb.3874$jJ3.57137@newsfep4-glfd.server.ntli.net>, Martin 
<ml_news@ddnospamddml1dd.co.uk.dd> writes

On a slightly less extreme scale:

Is there any advantage in using the moon to 'sling-shot' probes into 
our solar system rather than using big boosters and a long time?

I think the advantage would be more than offset by the horrible 
limitations that puts on your launch trajectory. You don't even get much 
advantage because the Moon is so small.
OTOH, using the Earth for a sling-shot is almost standard practice.

It's my understanding that Clementine performed a slingshot pass of the
Moon on its way to the asteroid Geographos.

-- 
Mike Williams
Gentleman of Leisure