As Stan pulls out the gold with the jewels, He is traveling on northbound US 101. In the next shot of the car with Stan traveling on the freeway near the Hollywood hills, the freeway has four lanes with two in each direction. In reality, US 101 going through Hollywood has eight lanes with four in each direction.
As Stan is driving away from the Los Angeles Center Studios, the Griffith Observatory is shown in the background. In reality, the Los Angeles Center, Studios is near Downtown Los Angeles and not even close to the Los Feliz Area, which is where the Griffith Observatory is located near.