This song is about a man who has died and as he's about to enter heaven, he realizes he still has a lot to do on Earth, tasks to accomplish and for this he wishes to escape the afterlife and return.
At this point, it's more of a theme song for The Rev because we all agree that he still has a lot to do here. It's not about suicide or related themes.
He was a good drummer and brilliant songwriter. Avenged Sevenfold has suffered a big loss which may not be able to be compensated. Forever!