6 Video – The Four Horsemen – Rockin’ Is Ma Business March 21, 2009 by Rob Rockitt · Entertainment · Hard Rock Music · Hard Rock News · Hard Rock Videos · Music · Video Where oh where are The Four Horsemen in 2009? With so many of the late eighties and early 90’s bands doing reunion shows, isn’t time for Maryland’s finest sons to do some reunion gigs?! Check out their video, “Rockin’ Is Ma Business” below.