If you need video proof, I took some while playing with friends.
http://www.livestream.com/jiber/video?clipId=pla_73bad179-bc4d-4c98-9dca-2d7283c1bf32&utm_source=lslibrary&utm_medium=ui-thumb

Yes, I apologize, that was my brother being immature. I asked him to finish writing it for me. Again I apologize.

As a real helicopter pilot, I know that many helicopters are capable of completing such a maneuver, but it isa stressing task for both the aircraft and the passengers.
Keep in mind that the '200s' is 200 kilometers per hour, which converts to about 124 miles per hour. At those speeds, certain helicopters can perform these types of maneuvers, but I have not actually seen the action in-game, but the Ah/Mh-9 as the helicopter doing said action does seem quite a bit odd.
Just my knowledge, don't get butthurt and rage over the Internet about this.