Continuity mistake: The background scenery, with the lighthouse in it, moves from right to left when Shield Agent Mac and his old school friend talk to one of the relocated scientists. However, in the next shot, it runs from left to right, as if they are on a boat. In reality, it shouldn't be moving at all. (00:18:16)
Continuity mistake: Right after Yo-Yo runs into Ivanov in the hallway, Fitz fires his gun at the robots. His gun is empty after he fires it. But in the following shot, it's been reloaded again.
Continuity mistake: When Daisy throws Ruby into a tree, her circular blade lands somewhere off-screen. But moments later, it's right next to her.
Collision Course (Part II) - S6-E9
Continuity mistake: When Mack and Davis slide down the rope, they're wearing gloves. You see Davis take his gloves off, but Mack hasn't quite started to when we see Yo-Yo close to landing. When the shot cuts, Yo-Yo is landing and Mack now has his gloves off as he draws his weapon.
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.