Bruising of foot; foot was all messed up/it was all bruised and swollen, but it was not broken. She says this was her right foot; Fatigue; had a low blood sugar episode she supposed; passed out/Unconsciousness; had muscle spasms almost to seizure amount of shaking/full body muscle spasms; had muscle spasms almost to seizure amount of shaking/full body muscle spasms; crashed unconscious to the floor/fell/fell backwards/caught her foot under the vanity; This is a spontaneous report from a contactable consumer (patient) reporting for herself A 70-years-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 MRNA VACCINE), dose 2 via an unspecified route of administration, administered in the left arm on 20Feb2021 11:00 (Lot Number: EN6201) as a SINGLE DOSE  (at the age of 70 years old) for covid-19 immunisation.  Medical history included breast cancer from 1988 to an unknown date , ovarian cancer from 2015 to an unknown date , she has had lymph nodes removed from her right arm "30 years ago" from 1988 to an unknown date, pass out from unknown date to unknown date. Concomitant medication included olaparib (LYNPARZA) taken for ovarian cancer from Feb2020 at 150mg, 2 tablets in the morning and 1-2 tablets at night by mouth.She says she is a little person and couldn't tolerate the side effects of that, so she varies how many she takes based on her side effects. She says she is supposed to take 300mg in the morning and 300mg at night. She says how she takes it is, she takes 150mg or one pill in the morning, then one or two at night depending on how she is doing. Historical vaccine information included BNT162B2 dose 1, lot no: EL9264, route left arm for Covid-19 immunisation. Past drug history included on days of intravenous (IV) chemo when she was being highly treated in the past sometimes she would pass out. The patient reported approximately 15 hours after the shot, on 21Feb2021 she had muscle spasms almost to seizure amount of shaking, full body muscle spasms. She clarifies that her side effects didn't kick in until 02:30AM on 21Feb2021. She says at 07:00AM on 21Feb2021 she got up and went into the bathroom and passed out, and had a low blood sugar episode she supposed.  She crashed unconscious to the floor. She said that could be from the shot, but she is also a high risk patient, a cancer patient, and is on a maintenance chemo drug. She says on days of intravenous (IV) chemo when she was being highly treated in the past sometimes she would pass out, so she doesn't know if that was related to the COVID shot or not. No testing had been done on high risk patients, so she thought maybe this could be a good heads up for something someone else may experience. Her side effects were on and off for several hours, the shaking and spasms would subside and then start again. She says that they went away, and then she got up and passed out, and her foot was all messed up, she doesn't know what she did when she fell, but she had it checked and it was not broken, it was all bruised and swollen, but it was not broken. She says this was her right foot. She says she thinks she fell backwards, and she thinks she caught her foot under the vanity. On unknown date, she experienced bruising of foot, fatigue, foot was all messed up/it was all bruised and swollen, but it was not broken. She says this was her right foot. Outcome of the events was unknown.  Information on the lot/batch number has been requested.