How does Obito die in Naruto?

he blow hisself up when trying to kill sasuke but sasuke manage to escape by using madra the snake he develop from orochimaru. Noooooo!!! Deidara mah awesome babii died!! dam yuh Sasuke! well not exactly. I wonder how they ended up fighting...these are the questions that haunt meh. Lolsz i always wanted to say that. :)