Continuity mistake: At the beach, in the first close shot of Mia, her hair is moving mildly. A mere frame later, it's moving wildly and is messed around her face.
Continuity mistake: Right after the opening credits, there's an aerial view of London. Check a seagull on the left flying over a ship. When the scene evolves into a POV window-view, the seagull magically vanishes in mid-flight, revealing the image was frozen and used on a green screen.
Continuity mistake: The timing is off between the 6th film and the 7th. After 6, Deckard Shaw goes to see his brother who still has physical cuts and bruises which shows this is day or weeks after 6, but Han as shown in Tokyo Drift has time to go to Japan, get over Giselle, form a friendship with the son of Yakuza, build loads of flash cars and an empire before being killed. This would have taken years, but it looks like Deckard went after them straight away.
Continuity mistake: During the car chase in Azerbaijan when Brian exits the car through the windshield his butt is pointing at the copilot's seat. Half a second later he's magically turned 180° despite standing on a car at 150km/h.
Continuity mistake: Toretto grabs a Corona beer and strolls with Mr. Nobody. They pass by a mechanic fixing a jeep on their right, and a welder ahead facing them and the mechanic. In the wide angle not only is the jeep mechanic not there, but he is several meters ahead. The welder who was facing them is now turning his back to Toretto.
Continuity mistake: In the Dominican Repulbic Mia tells Brian "you won't" with her hand on his left shoulder. A shot later her hand is lowered and she is placing it again.
Continuity mistake: The position of the second 'Captured' stamp that Hobbs puts on a photo differs between the first and second shot. The second time it's above the picture, mostly out of it. This is not the already listed mistake about the first stamp.
Continuity mistake: When the movie begins Letty and Toretto talk inside a car. In the wide angles her hair moves a lot but in the close-ups it barely moves, this changes back and forth revealing the close-ups were shot with the car driving at a much lower speed.
Continuity mistake: After Letty rescues Bryan from the bus we see her car door being shut twice (shot of her getting out and shot of her getting back in) - both times the door window moves up about 3cm a second after she shuts the door in each shot. The part that "appears" at the bottom has much less dust on it.
Continuity mistake: While Dom and the others are chasing the convoy to get Ramsey, the sun on the floor changes between shots.
Continuity mistake: During the coach chase the front of Doms car shows signs of bullet holes just under the front of the bonnet. When he goes over the cliff the front of his car is perfect.
Continuity mistake: When the coach driver gets shot all of the cars around it immediately disappear, Letty was beside it and a black 4x4 in front of her plus the chasing cars.
Answer: Cards.