Board Thread:Theories and Speculation/@comment-5407586-20150624095943/@comment-25079709-20150626222529

Seelentau wrote: The main rationale is "Deidara used the Earth Release sign the moment he let his technique explode, we know that the explosion is Explosion Release, so Earth Release must be part of Explosion Release.". Sasuke's analysis isn't really important. Actually it's not true. When Deidara let his technique explode he's doing "katsu" sign: http://i40.mangareader.net/naruto/248/naruto-1567580.jpg Every time he fight: vs Gaara, vs Sasuke, vs Onoki, vs Surprise Division, to detonate the bomb Deidara use Katsu. In whole manga he use Earth Release sign only one when he break C4 but NOT to detonate C4.

So I think that when he prepare his clay before battle he add Explosion Release to normal clay making it Explosive clay. Then he can't just throw clay to his opponent so with his mouth he add to clay Doton chakra forming it to some shape and to control it. Next his move his bombs through his chakra via Doton, and when he want to detonate it he use Explosive Release chakra with Katsu. That's why when he break clay of C4 he use Doton sign, but he detonate those super small bombs from C4 he use Katsu.

When Sasuke attack bombs with Raiton he counter Doton so Deidara lose control of his bombs. Then we have 2 options why Deidara can't detonate them: 1) because he don't control them so chakra disappear from them (just like chakra disappear from charged weapons) 2) no matter if Explosive Release is Katon + Raiton or Fuuton + Raiton, it's still have Raiton so Sasuke's Ration attack can discharge it or sth