TMZ TMZ reports TMZ TMZ filed against late "Jackass" star Ryan Dunn TMZ the parents of Zachary Hartwell are suing Dunn's estate http://www.tmz.com/2012/08/08/ryan-d...#ixzz2mVyAsToE TMZ filing suit TMZ.com http://www.tmz.com/2012/08/08/ryan-d...#ixzz2mVyAsToE filing suit