When Ralph flies around the desert looking for the plane, he crashes by the same pile of sand over and over again.
Obvious stunt double when Ralph takes off flying in the desert.
The ultra modern gun sight is installed in a vintage 1950's F-86 Sabre. To properly test it the platform should have been a current aircraft type such as the F-14/15/16/18.
As Ralph is explaining to Pam that he's going to have to go through the whole dining room to leave the restaurant, there is an exit sign above the door behind him.