unless you were in a deep coma when it happened, i'd expect that the severe pain of breaking a leg bone would put high salience on the memory preceding the breakage and you might develop subconscious aversions to the most unusual features of that experience- like tensing up at the intersection where you got hit by a car while crossing the street, and at other intersections that have the same configuration of elements
i think it is useful to be aware of this because there are treatments like emdr and emres that can help reprocess and integrate the memory with adjacent non-traumatic memories such that you no longer have such a strong reaction because your mind properly assesses the low likelihood of that particular situation happening again