Doctors and scientists aren't really sure why they happen, but they have a few theories. One theory is that your brain misunderstands the sensation of your muscles relaxing as you drift off to sleep. It's normal for the muscles to relax, but the brain gets confused, and, for a minute, thinks you're falling. In response, the brain causes your muscles to tense up so you catch yourself before you fall down.
The former Beatle Paul McCartney has married American heiress Nancy Shevell at Marylebone register office in London. The couple waved to crowds packed behind security barries after they made the short drive from Sir Paul's north London home to the venue.
Paul McCartney net worth: $1, 2 billion. A highly successful English musician and the member of the legendary Â«The BeatlesÂ» band, Paul McCartney is recognized as one of the most prominent composers in the pop music history. Born in 1942 in the family of a salesman, now Paul is a proud owner of numerous awards and a multi million net worth. Sir Paul McCartney has presented 60 gold discs and sold over 100 million of singles. According to Forbes Magazine calculations, the net worth of Paul McCartney is estimated at $1, 2 billion.