what does it mean to jackknife a trailer
Jackknifing Jackknifing refers to the folding of an articulated vehicle i.e. one towing a trailer, such that it resembles the acute angle of a folding pocket knife. If a vehicle towing a trailer skids, the trailer can push the towing vehicle from behind until it spins the vehicle around and faces backwards. This may be caused by equipment failure, improper braking, or adverse road conditions such as an icy road surface. In extreme circumstances, a driver may attempt to jackknife the vehicle deliberately in order to halt it following brake failure. A jackknife event of a heavy vehicle can be fatal to the driver as the top of the cab can be crushed or sliced off as it swings round violently and tries to fold under the trailer.[citation needed]
The Shining (film) Also likely significant is that before Jack's behavior starts becoming aberrant, he is seen throwing a tennis ball hard against Amerindian artwork on the walls and floor, and just a few feet over a mounted buffalo head (which was an animal key to the Plains Indians' economy and culture before it was hunted and slaughtered nearly to extinction in the 19th century, mostly by Euro-Americans). Later, Jack murders Halloran, and tries to murder his family, using an axe, which resembles the tomahawk, a frequently depicted weapon of the Amerindians.