In a flashback to his acting career, Tom Tucker is shown appearing on The Cosby Show, as if it was filmed in Los Angeles. In reality, it was filmed in New York, due to Bill Cosby disliking working in Hollywood.
The plane landing at LAX shows the mountains close to the airport. Actually LAX is at sea level and the mountains are far away, it's basically a desert.
When Peter enters Tom Tucker's dressing room, his position and reflection don't match.