I see what you are getting at, but please hear me out, what if he is only able to use his once he has created mud? because mud is just a mixture of earth and water, you should be able to mimic his jutsu with your water explosion inside of his mud could you not? And if that is the case, then wouldn't that make his technique different enough from yours to be a different jutsu?dude u do not understand what i am saying >.<
he can create a ****ing lightning explosion and it would not bother me coz its lightning and not water or earth.
it would bother a person that already created a lightning explosion jutsu =|
but in the case, mud is made up of water and earth and hence he needs to know both the original earth jutsu and water jutsu to use it =|
and btw how close to your description was his? It could be that he simply didn't know about your jutsu. But I may be wrong.
either way I think I am pretty much in agreement with your argument.