Quick changes in direction or fast braking could cause the trailer to jackknife.
Besides catching lobsters, he paints in oils and water colors, does wood carving with his jackknife.
Resampling with a bootstrap or jackknife algorithm creates multiple samples from a single sample.
British Dictionary definitions for jackknife
noun (pl) -knives
a knife with the blade pivoted to fold into a recess in the handle
a former name for a type of dive in which the diver bends at the waist in midair, with his legs straight and his hands touching his feet, finally straightening out and entering the water headfirst: forward pike dive
(of an articulated lorry) to go out of control in such a way that the trailer swings round at an angle to the cab