I think this is before the assumed well incident. Reason being, if you look at the picture of unconscious Killian closely, he has dirt all over his face. Given the promo pic above, my guess is he did a face plant after getting hit with a blow by the WWW. Who knows what happens after that, whether the WWW takes him to use him as a tool in desperation, or if something else happens. Either way, I think this is before Emma seemingly pulls him out of water.
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