When Marty reaches over the railing to grab the "Sports Almanac" magazine from Biffs back pocket you see that Biff is reading the "Oh LaLa" magazine. You can see the cover of it right before Mr. Strickland approaches him. Then when Mr. Strickland grabs the magazine out of Biffs hand he is holding it up and you can see the cover of it now and it is the "Sports Almanac" magazine cover. That is when Mr. Strickland says "Sports static's." How did Biff get the cover of the "Sports Almanac" magazine on it so fast? You never see him taking it off the magazine to put it on the "Oh LaLa" magazine. It remains in his pocket the whole time.
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During the chase seen when Marty is driving away from the Alibians you see him changing the gear. He changes it to second gear, and then in the next shot he puts it into second gear again. But he never shifted back to shift the into second gear again.
When Lorraine goes over to Docs to ask Marty to the dance pay close attention to her. As she is following Marty over to the left side of the car (drivers side) talking to him watch her. You only hear her talk speak; her lips are not moving at all.
When Marty McFly is back in 1955 writing the letter to Doc at the café look at the style of the business letter. That is when Marty is explaining to Doc that terrorist will shoot him in 1985. Then when Doc shows the letter to Marty in 1985 you can see that it is a different styled business letter from the cafe.
