I played a car racing game on my mobile and I felt kind of giddiness afterwards. I wasn't necessarily tired or something just felt my vision was overstimulated and brain overloaded with information! I had to take a small nap before feeling fine. I don't know if this symptom can be related to the PCS or not because after mtbi I think we tend to link even normal uneasiness feelings to PCS. Correct me if I am wrong