Possibly the most epic mod ever in Minecraft!

It's called Explosives+, Yogscast have done video's on the mod:

Part 1: http://www.youtube.com/watch?v=01CYoofl-n0&feature=relmfu

Part 2: http://www.youtube.com/watch?v=0CxvJy1Op1E&feature=context-shows&list=SL

Part 3: http://www.youtube.com/watch?v=iVvOvPBNmx4&feature=context-shows&list=SL

Download here: http://www.minecraftforum.net/topic/830138-132-explosives-pr-v39500000-downloadspre-release-4-132-sept

Note: You could murder your computer, if it's not strong enough... But it's still a cool mod.