Creepers Used for Excavating Obsidian

After all this time people just avoid or kill creepers when mining. What if they can be used to get obsidian in a quicker manner. This can be a dangerous and tricky task but worth the effort. The player would need to position the creeper directly on top of the obsidian in order for it to work. When the creeper explodes it can break a small chunk (2x2 or 4x4 if its a charged creeper) which makes a more fun and efficient way of collecting obsidian. Creepers can sometimes malfunction and/or kill the player when exploding. Minus the chance that when the creeper explodes the obsidian can fall into the lava underneath. This was just a feature idea to help give players more of a fun and challenging way to get obsidian.