I just found out about blender camera flying, and found a nice use for it.
its like an inbuild racing game, build your own track, place the cam and you are ready to go.
here is an example track.
http://www.savefile.com/files/991176
i managed to get two laps(only)
speed was 3 mouse scroll units.
select the cam, go to camera view(numpad 0), and pres “Shift+F”,accelerate/deacelerate by scrolling,move with mouse.
How many laps did u get?
lets be honest