Like many things that are misunderstood it can be summed up with, "It's a Southern Thang, y'all wouldn't understand" I like exciting, explosive events as long as they're planned. I have a buddy with an 8# black powder mortar he built, he shoots it during the Spring and Fall. It's really fun except trying to recover the concrete projectiles (we usually just make a half hearted attempt).
Explosive welding (according to the some show I saw) is used to join very dissimilar materials together. I think they use it to make up a lot of the armor plating in current use. Really neat to watch... and an interesting combination of skill sets. metallurgists, machinists, demolition experts. They were doing the "welding" in an old mine shaft. Supposedly the process was discovered when someone noticed that shrapnel would weld to armor.