Mike removes his messenger bag before he and Trevor have a fistfight. Mike leaves the apartment without picking up the bag. In the next scene he is walking down the street with Harvey and has his bag back around his chest.
When Mike arrives at the car dealer, after cycling through the city with his helmet on, his helmet is missing.
When Rachel and Mike are at the restaurant, the slider has sesame seeds on the bun in the first shot close up, but not in the second shot.
At Mike's dinner - the bill is broken down with a subtotal of $8561.04, tax of $385.24 (4.5%), gratuity of $1712.20 (20%) and a total of $10568.48. The combined city/state tax rate on food and beverages in New York City is 8.875%, not 4.5% as the subtotal indicates.
Although the F1 car Harvey is showing Mike is a Midland, the car was actually powered by a Toyota unit, and only had one dismal F1 season.