Don't overthink it. It's just a lyric.
The general theme of the song is the Bonnie Tyler is waiting for a "hero" like the heroes in the movies etc.
And "the hero coming back to save the girl by reaching and taking her hand and pulling her forward out of danger at great personal risk" is a movie scene. So she is fantasising about being rescued from peril by the hero who comes back to save her.
Like I said, don't overthink it.
