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  2. Horse-collar tackle - Wikipedia

    en.wikipedia.org/wiki/Horse-collar_tackle

    The tackler's right hand has grabbed the Cowboy runner's collar and is using it to pull him down from behind. The horse-collar tackle is a gridiron football maneuver in which a defender tackles another player by grabbing the back collar or the back-inside of an opponent's shoulder pads and pulling the ball carrier directly downward violently in ...

  3. Horse harness - Wikipedia

    en.wikipedia.org/wiki/Horse_harness

    A horse harness is a device that connects a horse to a horse-drawn vehicle or another type of load to pull. There are two main designs of horse harness: (1) the breast collar or breaststrap, and (2) the full collar or collar-and-hames. For pulling heavy loads, a full collar is required because it distributes pressure over a larger area of the ...

  4. Tackle (football move) - Wikipedia

    en.wikipedia.org/wiki/Tackle_(football_move)

    This tackle involves the defender reaching his hand inside the ball carrier's collar, grabbing the collar (and usually, the collar of the shoulder pads), and pulling player straight down or backwards and down. The tackle has the potential to cause severe injuries to the tackled player's neck, legs and ankles.

  5. Drill string - Wikipedia

    en.wikipedia.org/wiki/Drill_string

    Pulling the drill string out of or running the drill string into the hole is referred to as tripping. Drill pipe, HWDP and collars are typically racked back in stands in to the monkeyboard which is a component of the derrick if they are to be run back into the hole again after, say, changing the bit.

  6. Tripping (pipe) - Wikipedia

    en.wikipedia.org/wiki/Tripping_(pipe)

    Tripping pipe (or "Making a round trip" or simply "Making a trip") is the physical act of pulling the drill string out of the wellbore and then running it back in. This is done by physically breaking out or disconnecting (when pulling out of the hole) every other 2 or 3 joints of drill pipe at a time (called a stand ) and racking them ...

  7. Helping the runner - Wikipedia

    en.wikipedia.org/wiki/Helping_the_runner

    Helping the runner, also called assisting the runner and aiding the runner, is a penalty in gridiron football that occurs when an offensive player pulls or carries the ball carrier in order to gain additional yards. [1] Though originally a common call, the penalty has become extremely rare, having last been called at the professional level in 1991.

  8. Pass interference - Wikipedia

    en.wikipedia.org/wiki/Pass_interference

    Once a forward pass is in the air it is a loose ball and thus any eligible receiver – all defensive players are eligible receivers – may try to catch it. When a defensive player catches a forward pass it is an interception and their team gains possession of the ball. Some actions that are defined as pass interference may be overlooked if ...

  9. Off-tackle run - Wikipedia

    en.wikipedia.org/wiki/Off-tackle_run

    An off-tackle run in American football is a play in which the running back carries the ball through a running lane off of the tackle's block. The lead block kicks out the end man on the line of scrimmage, and another offensive player usually blocks the linebacker. It can be useful in short yardage situations, [1] and with large backs. [2]