Answer: jackknifing

AnswerCrossword Clue
JACKKNIFINGForming an angle, as a car and a trailer
jackknifing(of an articulated vehicle) Bend into a V-shape in an uncontrolled skidding movement
jackknifingMove (one's body) into a bent or doubled-up position
jackknifingJACKKNIFE, to fold up like a jackknife
jackknifing(of a diver) Perform a jackknife