My biggest fear of death is to come back reincarnated
One of the biggest fears of players in a shootout is letting your teammates down.
My biggest fear in life is fear.
My biggest fear in life is to be forgotten.
Or maybe. . . their biggest fear is that they will get close to you again, and you'll go and drop dead.
My biggest fear is mindlessly and stupidly repeating myself.
My biggest fear in life is to be average.
My biggest fear is looking weak, girly, and pathetic.
The biggest fear of my life is living. My second biggest fear is dying.