Of all the professions there are in the world few are as frequently associated with glitz and glamour as much as being a DJ. The perception is often of a lifestyle which involves traveling around the world playing music to adoring crowds waving their hands in the air, worshipping the person spinning the tunes as something of a demi-god. Of course, not everyone gets to be an international superstar DJ, and the road to success in the DJ booth is a long and hard one which few actually make. Given the hugely competitive nature of the business, if you want to make your mark as a DJ you'll have to cross numerous hurdles and hope that your taste in music - and ability to know which tunes go well together - is enough to please music fans and promoters alike. Whether you're a major DJ renowned for world tours or a resident in a small local club who occasionally ventures out of your home town, the chances are you'll have shared similar experiences and have more than a few stories to tell. If nothing else, being a DJ offers a unique insight into the kind of things people get up to when they're completely off their heads. Here are 15 things only DJs will understand - there's a lot more to it than simply playing other people's music.