The particle accelerator exploded and Danny Phantom is conducting an invisible investigation, but how separate will he remain once it becomes clear something remarkable has happened to one Barry Allen?
"'What am I without running, Iris?' he asks. 'What is the Flash without his legs?'" A tag/extended scene to 2x06: Enter Zoom.
Iris hadn't allowed herself to fully process how close she came to losing Barry that night, but thankfully, Barry's there to help her get through it when she does.