Line of Scrimmage

The Line of Scrimmage ( roughly translated as crowds line) is the line from the start the moves at the American Football. If the thrower of the attacking team, usually the quarterback before the line of scrimmage, he can and just throw it past the right side.

If the quarterback or another player tackled in an attempt to pass behind the line of scrimmage, it's called blind. The line of scrimmage is thus only a fictitious line that is drawn through the position of the ball before the start of the turn. It is effectively the "front ", with the participation of Offense and Defense face before the upcoming hustle and may not be exceeded before the snap.