Here’s why you should never drink alcohol and take a nap afterwards when on an airplane. Long flights usually make people want to sip some alcohol while travelling on the air, but it might be a very bad idea. Many airlines offer passengers, especially those in their first-class and business class cabins, alcohol. Plus, there is also something about being on air that makes people want to take a quick nap. A study by German scientists has found that in-flight alcohol and cabin pressure at cruising altitude can strain the hearts of sleeping passengers. The researchers found that when people fall …