One glaring technical error
In the scene where Paul is in the late Davids car in the garage and a cop car pulls up near him, the symbol on the cops door is clearly the seal of California, and the car is clearly an LAPD black & white. Now David was supposed to have left LA and returned back east (I believe Detroit) which is where Paul was at that moment.
It takes a big man to cry.
It takes a bigger man to laugh at that man.