clipped from en.wikipedia.org

The snatch is one of the two olympic weightlifting events (the other being the clean and jerk).

The essence of the event is to lift a barbell from the platform to locked arms overhead in a smooth continuous movement. The barbell is pulled as high as the lifter can manage (typically to mid chest height) (the pull) at which point the barbell is flipped overhead. With relatively light weights (as in the "power snatch") locking of the arms may not require rebending the knees. However, as performed in contests, the weight is always heavy enough to demand that the lifter receive the bar in a squatting position, while at the same time flipping the weight so it moves in an arc directly overhead to locked arms (the quick drop). When the lifter is secure in this position, he rises (overhead squat), completing the lift.

The lift requires not only great strength but also a high degree of shoulder flexibility, excellent balance, and speed.