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Continuity mistake: In Batman's lair, after Barry has been electrocuted, the blood on his nose and mouth suddenly vanishes.

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Continuity mistake: When the truck filled with drums overturns, a drum bounces out on the road. Shot changes and the drum is gone, only to fall again a second later.

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Continuity mistake: After old Barry has failed trying to go through the wall, young Barry is lying on the floor trying to stand up. His position keeps changing in every shot from frame to frame: sometimes he leans on his left side, then suddenly on the right, and sometimes he leans on his back. (00:45:12)

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Continuity mistake: When Old Barry tries to cross the wall with Young and fails, the way the fallen coat folds on the floor changes between shots.

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Continuity mistake: Old Barry is holding Young, about to try and cross a wall, with Young's arm lowered and holding his coat. A shot later, Young's arm and coat are raised. (00:44:48)

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Continuity mistake: When the Barrys try to flee the lab, Old Barry holds Young's shirt at chest level with his left hand. A shot later, his hand is lowered.

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Continuity mistake: When Old Barry collapses in the lab, a yellow bottle lies 20 cm away from him. A shot later it's right next to him.

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Continuity mistake: Old Barry collapses next to Young Barry, and lies next to his waist. A shot later he lies next to his head.

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Continuity mistake: At the lab, when Young Barry collapses, his head lies on a white tile and his hair is all messed. A shot later it lies on a coloured tile and it's not messed.

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Continuity mistake: When the Barrys are at the lab, the headphones are either resting on the table or on top of the coat. This swaps back and forth.

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Revealing mistake: When the Barrys cross through the glass door, for a couple of shots, Young Barry's face is replaced with a non-realistic CGI face with features that don't match the face contour at all.

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Deliberate mistake: When Flash is at the coffee store, the pavement is dry. When he exits the place dressed as The Flash, it's wet for cinematic purposes, but a mistake nonetheless.

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Continuity mistake: While Gary wakes up, the stuff on the table changes positions or disappears between shots.

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Continuity mistake: The Flash eats half a burrito, but when it flies towards the knives, it's whole again.

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Continuity mistake: When Gary shows his Eric Stoltz tattoo, his arm and hand are resting on his knee. From the opposite angle, they are not.

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Continuity mistake: When Barry-1 and 2 fight outside their home, the position of their hands has no continuity at all between shots.

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Continuity mistake: When Old Barry meets Young Barry outside their home, the way the underwear folds on Old Barry's face differs between shots.

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Continuity mistake: When Young Barry slouches on the chair to eat peanut butter, the way the left side of his robe falls on the chair differs between shots.

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Continuity mistake: After Young Barry vanishes, Old Barry holds the robe from the upper part. When Young shows up, Old's hand is nowhere to be seen; the grip has changed.

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Continuity mistake: When Young Barry vanishes in the kitchen, the way his empty robe folds changes between shots. Also, the spoon falls on the robe but suddenly appears on the floor a shot later.

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