There are likely multiple detectors of risk of falling. Being on shaky ground is for sure one. In amusement parks, there are sometimes thingies that share and wobble and can also give these kind of feeling. Also, it could be a learned (prediction by the though assessor) reaction, as you mention too.
There are likely multiple detectors of risk of falling. Being on shaky ground is for sure one. In amusement parks, there are sometimes thingies that share and wobble and can also give these kind of feeling. Also, it could be a learned (prediction by the though assessor) reaction, as you mention too.