Recoil; a sudden backward motion, usually in the direction of the operator.
An accident wherein an object being cut by a rotatingblade or disk, such as a circular saw, is caught by the blade and thrown outward.
An accident wherein the upper tip of the bar of a running chainsaw contacts a relatively immovable object, forcing the bar upwards and pressing the running chain more firmly against the object, causing the saw to be hurled upwards and backwards into the operator's face.
A dangerous buildup of gas pressure at the wellhead.
The board separating one bowlinglane from another at the pit end.
In contract bridge, an ace asking convention initiated by the first step above four of the agreed trump suit.