Here was my first one this was the result. But then I got bored, for a few hours, and I made this. It had very few gaps and went all the way down to the bedrock. After a few minutes of looking at the same screen (my computer was locked up) this was the result.
Big fall, find a big cliff and go to the middle and dig right to the bottom, within one block radius fill that up with TNT, then press the red button.
You seem to like TNT, look up redstone cannons. Some people make very elaborate cannons (animals, tnt, etc).
With creative mode you can make HUGE explosions, if your computer can withstand it. Earlier I filled a whole cave system with TNT, used redstone repeaters to get the circuit to the circuit, blew it up and some of the devastation got to the surface, it was epic.
