Sore joints; his butt is still a little sore from falling; dizziness/ light headed; fainting; pain in upper abdomen area; Sweating; Nausea; falling; This is spontaneous report from a contactable consumer (patient). A 23-year-old male patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE) via an unspecified route of administration on 29Apr2021 at 1 pm (around 12:20ish as reported) (Lot Number: FN6206) (at 23-year-old) at single dose in arm right for COVID-19 immunisation. The patient's medical history and concomitant medications were not reported. No history of all previous immunization with the Pfizer vaccine considered as suspect, no additional vaccines administered on same date of the Pfizer suspect, no prior vaccinations within 4 weeks, no family medical history relevant to AEs. The patient stated he is a pretty healthy guy. All day after getting the vaccine he was fine. He got the shot at like 1 came home took a nap, ate some dinner, and was playing XBOX with the boys when this happened. At around 10:30 pm on 29Apr2021 he went to rub, his stomach just above his belly button and it hurt. He said that he read on line that that area is called the pancreas or liver, it has a lot of names for that area when looking online. He stated it's the left upper abdomen area he felt pain when he pressed on it. It radiated really fast across his abdomen while he was on the phone with mother. The more he pressed the more the pain got sharper, and it radiated right across the abdomen, mainly above belly button not too much in lower abdomen, not much in upper abdomen. It was very sensitive. He didn't have to press hard to trigger the pain. It was almost like the area was inflamed. It happened really fast and that it was his upper stomach not so much the lower part of his abdomen. He felt dizziness and nauseous and like a silly boy he tried to run to the bathroom. He stated that he fell and fainted. His butt was still a little sore from falling. He said when he woke up, he was sweating like he had been out side all day. He did not recall sweating any time he fainted in the past. The side effects were gone after about ten minutes. He was really light headed and had the crazy sharp pain in abdomen for about ten minutes and then it was gone. He had never had that kind of pain. He was laying on the floor for a couple minutes. He went to get his phone, and then sat back down and was sweating. He still had pain at that time but it only lasted about 10 minutes at most. He was still a little bit sore in some joints which was not unexpected. He confirmed that he had a little bit of sweating, and he fainted a little bit. Since the episode he hasn't felt any symptoms like that before, he has not had any pain like gastritis but he has had some random gastrointestinal things before. It's also reported nausea on 29Apr2021. No required to emergency room and physician office. He was on the verge of going to the ER while the pain was there. He was going to go until it stopped and to get checked out. No relevant test. The outcome of the events sore joints, dizziness and butt sore was unknown; for other events was resolved on 29Apr2021.  No follow-up attempts are needed. No further information is expected.