NOTE: None of this was performed in EMC (which is pretty obvious considering I'm not Diamond) Recently I discovered the fun of TNT in creative. This is now a mini-series of fun with TNT in single-player. I did a few tests, and decided that going on superflat, making a huge line of TNT, then igniting one block with a lever was favorite. So, I took some screenshots. The Great Line of TNT Mid-Explosion The final product.
I don't have the money nor the supportership to do that..... But I suppose I could mark off a 60x60 area like in town then fill it with TNT.