Always a good place to look for reference footage, I just caught today that they've got stock material from Universal Studios.
One search under "explosions" is all I needed to make myself happy.
http://corporate.gettyimages.com/marketing/m05/UniversalStudios/en-us/landing.asp?src=spotlight
LOVE that you can buy old "Battlestar Galactica" footage. Don't know what you'd do with it....
Like the title wasn't an obvious enough clue, I laughed my butt off at the beginning of "Test Tube Teens in the Year 2000" when they showed footage of "Buck Rogers" the TV show.