Pathological tendency to repeat the gestures made by others; occasionally seen in schizophrenia of the catatonic type. Also called echokinesis.
In third grade, I had suffered a bout of echopraxia. I had a crush on a girl, and as I sat behind her while watching a video in class, I would imitate the way she changed her position. If she sat cross-legged, so would I. If she lay on her stomach, so would I, etc...
It only happened a couple times. Honest!