 A full scale model of a Harrier was built for all close shots of  Schwarzenegger flying the plane; it was puppeteered from a crane on  a nearby building which was painted out with CGI. (As the Harrier  lands in the street, dust and debris stirred up by its jetblast is  all done in CGI; the CGI blast swirls up a CGI piece of paper which  is sucked into the Harriers CGI air compressor fan)