Wow, this is a cool trick. There's
a tutorial over at 360WTF that shows you how to remove explosions (and other particle effects) from a screenshot. I just tested it, and it works exactly as advertised. I know there've been times when I find a fantastic angle... but I can't see what I want to see because of an explosion. Now there's a way to take care of that!(Louis Wu 05:20:15 UTC)
Read the full article at halo.bungie.org