Hands started to shake; shaking of the hands that I could barely write/My legs were shaking very bad while I was walking down three slides of stairs; My hands became weak; Soreness of the arm the injection site for 2 days; This is a spontaneous report from a contactable physician (patient himself). A 58-year-old male patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, lot number: EJ1685; expiry date: unknown) via an unspecified route of administration, on 22Dec2020, at a single dose, for COVID 19 immunization. Relevant medical history included COVID infection last Apr2020. On the peak of the COVID pandemic he had the COVID infection, he lost the sense of taste and smell, had diarrhea although he did not have fever and did not have coughing. He also has medical history of opsoclonus myoclonus ataxia syndrome. He was tested for COVID, he was positive 2 times and then they did PET scan, MRI from head to toe. They were looking for tumor, neuroblastoma, what was causing the shaking, the myoclonus, the opsoclonus, the ataxia, they could not find anything. They gave him convalescent plasma and then they gave him immunoglobulin human normal (IVIG) 5 doses and they gave him high dose of steroid to the point that his blood sugar was reaching sky high they have to give him insulin. He was hospitalized 2 times, 3rd time was 2 days and sent home and then it got worst, so he was readmitted for another '3' days. So, he was sent home on clonazepam, it makes him drowsy and he went for physical therapy and slowly after almost after 8 weeks his symptoms disappear, and he was able to go back to work. His symptoms all recovered by the end of May, towards the beginning of Jun2020 he went back for the swab test, it was negative, COVID PCR negative and my antibody was positive. Concomitant medications included clonazepam, metformin and simvastatin. Patient went back to work and have no symptoms until this 07Jan2020. Like almost 3 week or two and half weeks after he received the Pfizer COVID vaccine. Two and half weeks later he started having symptoms like shaking of the hands that I could barely write and yesterday he could barely walk down the stairs. The patient received the Pfizer COVID vaccine on 22Dec2020. Immediately after the vaccination the patient felt that his hands became weak. He ignored it because it went away, like after a minute or so it went away. He went home and nothing happened, except for the soreness of the arm the injection site for 2 days, which really did not bother him. Then this past Thursday, 07Jan2021, he went to the church, he was lightning a candle and his hands started to shake, he can barely light a candle. He was able to do it although his hands were shaking. So, he went home. He ate breakfast, and called his neurologist and he said just to observe and then it went away. On Saturday night (09Jan2021) he noticed that his hands were shaking again when he was typing in the keyboard. He can manage to type but his hands were shaking. He went to sleep and just ignored it. Then yesterday, Sunday he worked again, it became worse, his handwriting was shaking. He was really holding on to the pen to write legibly and then he was in the third floor hospital, elevators did not work. So, he walked down through the stairs, both of his legs were shaking very bad while he was walking down three slides of stairs but he thought he came to the ground so he was able to walk on the flat floor on the street and able to walk home. The patient did not receive treatment for the events. Outcome of the event tremor was unknown, while for the other events was unknown. The consumer considered a causal relationship between the events and the vaccine.