[It's hard to hear but that almost sounded like a response. It almost sounded like his name. Hal can't tell for certain but he's going to take that as encouragement]

Barry, I know you can hear me! [At least, he hopes Barry can] Focus on that and come back. You've been gone for long enough. I don't know how the speed force works and I don't know how getting out of it works, but you're you so I know you can do it. Come back.