No matter what time we get up in the morning, what our day consisted of, or how late we decided to call it a night, getting a good night's sleep is something we all want and need, but all do differently. Some of us are naturally "restless" sleepers. Despite our exhaustion an efforts, we toss and turn, finding it almost impossible to get comfortable and (perhaps just when we get settled in and comfortable) are awakened by just about any little noise, movement, or glimpse of light. Yet, others (of us) are sound sleepers who easily fall asleep, remain virtually undisturbed and "incapacitated" until the next day or until the alarm clock jolts us out of bed (and with lots of effort at that).

However, the one thing that most of us have in common once we've dozed off is that from time to time we all experience a jerking action as our bodies and minds zone into the zone of sleep. And, it frequently leaves us with the feeling that we are falling.

Ever wonder why this happens, and what causes it? If you're like most of us, we're sure you have.

According to experts, it's all part of a phenomenon known as sleep start. Sleepstart, ironically is an occurrence that even scientists can't fully explain and don't totally understand. However the most widely accepted scientific speculation and explanation is that the brain misinterprets the relaxation process that muscles experience as you drift into sleep. As a result the brain then notifies, or rather, alerts the muscles, and encourages them to suddenly tense up in an effort to prevent the sensation of "falling".

However, experts assert that regardless of whether these jolts, jolt you out of sleep or not, they are quite common, normal, and nothing to worry about.