I'm sure I'm getting "Search Bar"ed for this but I don't care!
How did old man Madara die?
Well its simple.
Think back to Nagato, when Yahiko dies, he goes on a killer rampage after, "KACHIYOSE: GEDOOOOOOOOO MAAAAZOOOOOOOOOOO!"
Madara said that without being connected to the Gedo Mazo he would...