I say put a cube under a cloner object and make a grid of cubes. I then select 1 cube via mograph selection tool. How can I make this cube explode? Cant seem to work out how to get a deformer to only effect 1 of my clones?
Explosion or Explosion Fx deformers came long before Mograph and don't have a tie-in to Mograph Selection. You'd have to use two clones in a Coner but use the Shader effector (which can use the Mograph selection) to have one clone different in your grid and apply the deformer to that.