They are much easier to do (especially spotless / brand new ones) than lots of other things
(, Sat 25 Jun 2016, 21:21, Reply)
Virtually none of the stuff at the start is real. Not the buildings, motorways, cars, bikes etc. Aside from the actors in the foreground its mostly CGI.
https://www.youtube.com/watch?v=C8D_o8bOeOc
(, Sun 26 Jun 2016, 18:23, Reply)