Google dance or Google slap?

Hey guys,

I'd like to get some opinions on what might be happening with my rankings.

Since August of this year, I've utilized a mix of SENUKE and high PR blog comments to promote 36 keywords for my ecommerce site. Up until this past weekend, my rankings have been improving fairly steadily. From not being ranked, we've been able to rank 3 keywords onto the first page and another 10-15 or so onto the second page. We were at this stage for perhaps two to three weeks.

Two weeks ago, I purchased a BH2 package for two keywords that have been ranked ~15 for over a month. This past weekend, my rankings for all but 3 keywords have dropped out of the top 100. The 3 in question include the 2 I provided to BH2 and have all dropped in rankings significantly, down to 40, 80 and 90.

The site is 8 months old but has not experienced this sort of movements in rankings previously. Is this the Google dance? I was always under the impression that the dance happened way earlier, as keywords first begin to become ranked.

I have not received any notice from Google. Webmaster tools shows that impressions are now half of what they used to be.

Thanks in advance for any insight.