I only just found out he was a childhood friend of Bill Mumy and is in the video for Barnes & Barnes' Fish Heads. I remember explaining to an incredulous friend that the guy from Lost In Space and Bablyon 5 was responsible for that song; if I'd also told him that the bloke from Aliens was in the video I think his head would have exploded.
So many of my favourite movies of the 80s and 90s had Bill Paxton in them somewhere. Rarely the star, but somehow always there. RIP Bill.