Sippin on Straight Chlorine: Ned Edition

Okay so I have a new twenty ??ne pil??ts theory. During the music video for Chlorine, when he seems to be talking to someone else, we see Ned swimming in straight chlorine. Does Ned represent something? Because in the bridge, Tyler seems to be pleading for help; example below.
I'm so sorry, I forgot you
Let me catch you up to speed
I've been tested like the ends of
A weathered flag that's by the sea
Can you build my house with pieces?
I'm just a chemical
Maybe it's referring to his inner child? Or an old friend? Do you guys have any ideas, or am I just delusional?