Several commenters have written in asking about Thriller Guy's experiences with the Special Boat Services unit of the Royal Marines. As noted in the entry below, the Military Secrecy Act (MSA) prohibits TG from expanding on this experience, but several questions can be answered without running afoul of this legislation. TG was serving in an American military unit that traded training time with the SBS. This included dressing in full RM formal uniform. In the picture above, TG is the last soldier on the right. (Click to enlarge) Obviously, a much slimmer, younger and fitter man than he is today.
Anyone interested can check out the Royal Marine's official webpage, and for a really cool video about the SBS, go here. Of course in our day we didn't have all the advanced gear that these guys do; picture TG in more traditional frogman gear.