However, self-harm isn't the only risk of stimming. I’ve spent most of my life fighting what my body needs, because I know that if I give in, people might perceive me as a threat. For example: • Percussive movement , such as stomping my feet or whacking my palms on my thighs, could seem threatening because it looks like violence. • Sudden movement , such as stretching out my arms and fingers after curling them up just moments before, could seem threatening if it startles people.