Could not sleep; Hurting in my left arm really bad where they gave me the shot; Very bad, unbelievable pain in my neck and at the back of my head; Tingling in my right hand; Abdominal pain; Started getting thirsty; I vomited so much and I felt thirsty even more; Sick in my stomach; Felt like an electric shock just literally hit me in my body/Very bad, unbelievable pain in my neck and at the back of my head/Started having very weird, crazy effects; Started getting thirsty; I vomited so much and I felt thirsty even more; Diarrhea; I passed out and fell straight down on the ground; I woke up immediately and open up my eyes and it took me like 5 to 10 seconds for making me realize where I was; Waking up confused; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 32 year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 20Jan2022 (Batch/Lot number: unknown) at the age of 32 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "cholesterol" (unspecified if ongoing). Concomitant medication(s) included: ABILIFY; ZOLOFT; KLONOPIN; FENOFIBRATE taken for blood cholesterol. Vaccination history included: Bnt162b2 (Second dose), administration date: 21Jul2021, when the patient was 32 years old, for COVID-19 immunization; Bnt162b2 (First dose), for COVID-19 immunization. The following information was reported: LOSS OF CONSCIOUSNESS (medically significant) with onset Jan2022, outcome "unknown", described as "I passed out and fell straight down on the ground; I woke up immediately and open up my eyes and it took me like 5 to 10 seconds for making me realize where I was; Waking up confused"; NECK PAIN (non-serious) with onset 20Jan2022, outcome "recovered", described as "Very bad, unbelievable pain in my neck and at the back of my head"; DIARRHOEA (non-serious) with onset Jan2022, outcome "unknown", described as "Diarrhea"; PARAESTHESIA (non-serious) with onset Jan2022, outcome "unknown", described as "Tingling in my right hand"; ABDOMINAL PAIN (non-serious) with onset Jan2022, outcome "unknown", described as "Abdominal pain"; INSOMNIA (non-serious) with onset 21Jan2022, outcome "unknown", described as "Could not sleep"; VACCINATION SITE PAIN (non-serious) with onset 21Jan2022, outcome "unknown", described as "Hurting in my left arm really bad where they gave me the shot"; THIRST (non-serious), VOMITING (non-serious) all with onset Jan2022, outcome "unknown" and all described as "Started getting thirsty; I vomited so much and I felt thirsty even more"; ABDOMINAL DISCOMFORT (non-serious) with onset Jan2022, outcome "unknown", described as "Sick in my stomach"; FEELING ABNORMAL (non-serious) with onset Jan2022, outcome "unknown", described as "Felt like an electric shock just literally hit me in my body/Very bad, unbelievable pain in my neck and at the back of my head/Started having very weird, crazy effects". Therapeutic measures were taken as a result of neck pain, abdominal pain, vaccination site pain.  Clinical source: Consumer stated, "I took the Pfizer booster shot day before yesterday and I experienced a lot of side effects and I thought I was feeling better today which I was and something else just come up and I was wondering could this be something to do with the shot now.", "I had the Pfizer booster shot day before yesterday and within an hour, I mean they said it would be within 10 minutes exactly but when I took the shot I was feeling fine at the pharmacy where I had the shot, at (Facility name withheld) where I got the shot. So, in the evening that day, day before yesterday approximately at 4 or 5 o' clock I believe, I can't remember exactly, I started having like a very bad, unbelievable pain in my neck and at the back of my head and then I lay down and woke up I was fine. Also, few hours later, I started having very weird, crazy effects and diarrhea and tingling in my right hand and abdominal pain and stuff like that." Consumer further stated, "So, the next day, I could not sleep that night and I woke up the next day and I was hurting in my left arm really bad where they gave me the shot. So, this pain and stuff went on like that, 'I describe it like aches and stuff' and I took a Tylenol (treatment) for it. So, long story short, I woke up this morning and I was absolutely fine. So, then when I went for my evening walk and as I was walking I started getting thirsty and sick in my stomach and I vomited so much and I felt thirsty even more, I felt like an electric shock just literally hit me in my body and I passed out and fell straight down on the ground 'not on my face but on my back'. Well, then I woke up immediately and open up my eyes and it took me like 5 to 10 seconds for making me realize where I was and that now, I am fine (not clarified). So, I was wondering could that be the side effect to this shot as well?" So, I want to get to the bottom of these because I have never experienced anything like this in my life, I mean, you know falling to the ground like I was feeling the electric shock like I had described to you and then waking up confused and immediately when I opened up my eyes within 5 to 10 seconds, I realized what I had and that has never happened to me before in my life.  The lot number for bnt162b2 was not provided and will be requested during follow up.