Granfather Jokes

Once two friends were boasting about themselves. Santa Singh: Once my granfather's wrist- watch fell in the well. When it was taken out after thirty years it was still running.
Banta Singh: So what's great about it! Once my grandfather himself fell into the well. When he taken out afer thirty years he was still alive.
Santa Singh: How can it be possible. What was he doing in the well for thirty years?
Banta Singh: Why not! He was winding your granfather's wrist-watch.