As it stands, a handful of states - including Delaware, Nevada and New Jersey - are very close to offering regulated online poker. Nevada is the leader of the pack among US states when it comes to regulating online poker, bringing the country the first US-licensed real-money poker site in 2012.
Answer Wiki. Breathing pure oxygen kills you because it destroys the normal gas balance with CO2 (carbon dioxide) in the lungs required for effective oxygenation on the cellular level. That's why some modern lifesaving applications prefer using Carbogen instead of pure Oxygen. Carbogen is a 95:5 mixture of O2 and CO2.
With the benefit of breathing pure oxygen first, the current Guinness World Record for holding your breath underwater is held by Ricardo Bahia of Brazil at a whopping 20 minutes 21 seconds! Most people in good health can hold their breath for approximately two minutes. Experts believe that even a little bit of practice can increase that amount of time quite a bit.