Pagerank 4 without any kind of seo or advertising
 

I just found out that my team's website has page rank 4. Thing is, I didn't bother to advertise it, or validate it, or make it SEO friendly. Also it's mainly flash! I really don't understand how it could reach PR4. http://facepalmstudio.com. Any ideas guys? Hopefully I didn't do any blackhat SEO by...