Guess the title says it all ;)

You are hereby notified that the stunts and tricks displayed in this video are performed by professionals in controlled environments and under supervision. All models are at any time able and allowed to discontinue breathplay/breath holding during a take. Do not attempt to duplicate, re-create, or perform the same or similar stunts and tricks at home, as personal injury may result. The producer of this video is not responsible for any such injury or damage.