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Continuity mistake: When Daisy is hugging Jemma after proving they're both human, Daisy's right arm is hooked entirely around Jemma's neck. There's an angle change and a lens flare (possibly to help cover the cut) and Daisy's right arm is now at 90°, with her hand on Jemma's left shoulder. (00:21:15)
Chosen answer: Coulson believes he was resuscitated then sent to Tahiti to recuperate. "A magical place," he calls it. But in the "Agents of S.H.I.E.L.D." episode "The Magical Place", Coulson, through a mind-reading machine, learns that he was treated by S.H.I.E.L.D. and a fake memory of Tahiti was placed as a "mask" of sorts over the painful memory of the operation, which involved a drug seemingly of alien origin to repair the damage, coupled with a lot of morally dubious surgery.