Manual page 62 :(

[Kianoni]

Instead, here’s a quick test to determine whether you should read this chapter.
If you’ve been on the internet in the past ten years, I’m sure you’ve heard this
riddle. There’s a plane on a magical threadmill runway. The threadmill defies
the laws of physics and can rotate as fast as the plane’s wheels while going
in the opposite direction. If the plane rolls forward at 10 mph, the runway
underneath rolls backwards at 10 mph. The plane’s wheels spin up to 200 mph
and the runway rolls back at 200 mph. The question is, will the plane move
forward and take off or remain stationary?
If you had to think about it for even a second, you need to read this chapter.
The answer of course is yes, the plane will take off as normal.

WTF

..and if you didn't get it then think.

http://www.scribd.com/doc/51503478/IL2CoD-MANUAL-UK