Almost all of Tyson’s nervous ticks and twitches are small actions and his OCD compulsions are relatively small actions to take too. When he’s asleep, Tyson tries to make himself as small as possible and even when he’s having nightmares, Tyson’s body usually only allows him to make small motions.
As a child, Tyson was taught to be conscious of his every action and the appearance it gave. He had to stand a particular way, the proper way for an heir to the Delaney legacy. He had to gesture in particular ways, only when necessary and only in a controlled, calm manner.
He has been taught his entire life to avoid drawing unnecessary attention to himself. Tyson has been beaten and broken for accidentally getting noticed at the wrong moment. It’s ingrained into Tyson to keep himself inconspicuous.
Even when Tyson is purposefully trying to draw attention to himself, his motions will remain close to his body or small. A single wave before his arm withdraws, or his body will remain stiff as a board, tightly controlled and every motion purposeful.
He isn’t good at lowering his guard and relaxing, allowing his motions to be big and carefree. Tyson understands how to. He simply can’t make himself do it without tremendous effort and feeling wrong in his own skin for doing so.