Continuity mistake: When Simmons is scanning the tree, first she holds the scanner vertically, then the shot changes and instantly she is holding it horizontally. (00:07:50)
Continuity mistake: In the interrogation room, Skye asks "The truth. What are you after?" and Agent Ward replies "World peace." A few seconds after this line, the light on Skye's head and hair keeps appearing/disappearing/changes position. (00:22:25)
Continuity mistake: When Agent Ward goes onto the aircraft to find Agent Fitz and Agent Simmons having an argument, Simmons put a cup of coffee on the desk. It vanishes from the desk a few seconds after she does this. (00:15:40)
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.