he fell flat on his back facing the ceiling and didn't know where he was at that moment,He fell down 3 times; Vaccine nearly killed; He fell down 3 times going to use the bathroom and when he tried to stand up he couldn't feel if his leg is there/numbness in his leg bilaterally; Confused/messed up in the head; Unstable/Feels like he does not have much longer to live/feels like he is in a nightmare; Disoriented; Memory worsen; Fallen between the bed and table/fell multiple times in the hallway; Weakness; Felt unstable on his feet/off balance; This spontaneous case was reported by a consumer and describes the occurrence of LOSS OF CONSCIOUSNESS (he fell flat on his back facing the ceiling and didn't know where he was at that moment,He fell down 3 times) in an 84-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 027L20A and 031L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.  No Medical History was Reported. Concomitant products included ASA for an unknown indication.  On 20-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 20-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On an unknown date, the patient experienced LOSS OF CONSCIOUSNESS (he fell flat on his back facing the ceiling and didn't know where he was at that moment,He fell down 3 times) (seriousness criterion medically significant), VACCINATION COMPLICATION (Vaccine nearly killed), HYPOAESTHESIA (He fell down 3 times going to use the bathroom and when he tried to stand up he couldn't feel if his leg is there/numbness in his leg bilaterally), CONFUSIONAL STATE (Confused/messed up in the head), FEELING ABNORMAL (Unstable/Feels like he does not have much longer to live/feels like he is in a nightmare), DISORIENTATION (Disoriented), MEMORY IMPAIRMENT (Memory worsen), FALL (Fallen between the bed and table/fell multiple times in the hallway), ASTHENIA (Weakness) and BALANCE DISORDER (Felt unstable on his feet/off balance). At the time of the report, LOSS OF CONSCIOUSNESS (he fell flat on his back facing the ceiling and didn't know where he was at that moment,He fell down 3 times), VACCINATION COMPLICATION (Vaccine nearly killed), HYPOAESTHESIA (He fell down 3 times going to use the bathroom and when he tried to stand up he couldn't feel if his leg is there/numbness in his leg bilaterally), CONFUSIONAL STATE (Confused/messed up in the head), FEELING ABNORMAL (Unstable/Feels like he does not have much longer to live/feels like he is in a nightmare), DISORIENTATION (Disoriented), MEMORY IMPAIRMENT (Memory worsen), FALL (Fallen between the bed and table/fell multiple times in the hallway), ASTHENIA (Weakness) and BALANCE DISORDER (Felt unstable on his feet/off balance) outcome was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.  No treatment information was provided.  This case concerns an 84-year-old male with a serious unexpected event of loss of consciousness, and nonserious vaccination complication, hypoaesthesia, confusional state, feeling abnormal, disorientation, memory impairment, fall, asthenia, and balance disorder. Event onset with unknown latency after second dose mRNA-1273. Based on current available information and temporal association between the use of the product and the start date of the event, a causal relationship cannot be excluded.  Most recent FOLLOW-UP information incorporated above includes: On 21-Jun-2021: Added Vaccine Dose dates, New events Feeling abnormal ,Disorientation, Confusional State, Fall, Asthenia, Balance disorder added.; Sender's Comments: This case concerns an 84-year-old male with a serious unexpected event of loss of consciousness, and nonserious vaccination complication, hypoaesthesia, confusional state, feeling abnormal, disorientation, memory impairment, fall, asthenia, and balance disorder. Event onset with unknown latency after second dose mRNA-1273. Based on current available information and temporal association between the use of the product and the start date of the event, a causal relationship cannot be excluded.