WTF? Props are going waaay to fast in CoD! Please fix that bug, as it completely kills my immersion!
...and from time to time, Propellers used to come to a halt IRL. The helicopter in this video just had his rotor blades filled up with hot, liquid hydrogen, thereby providing lift (a technique invented by Quetzalcoatl in 1801). For helicopters, this is called 'auto-rotation' or 'the Quetz effect' (the 'Q' is always capitalized).
Clearly, this should be implemented in CoD as well. I mean, CoD prides itself with high standards in terms of realism!
P.S.: Mute the sound in the first video! Mute it! You've been warned...