A 71 y/о mаle with а histоry оf hypertension presents to the ER complаining of dizziness, nausea, vomiting, headache and difficulty sitting and standing. His wife reported that he had slurred speech and shaking of his left arm. He was ataxic on left finger-nose and heel-shin testing, but normal on the right. He had great difficulty performing the tandem gait and had a positive Rhomberg test, and stumbled to the left (a clinician asks a patient to close their eyes The essential features of the test are as follows: the subject stands with feet together, eyes open and hands by the sides, the subject closes the eyes while the examiner observes for a full minute. If the patient falls, they have a positive Rhomberg sign). His somatosensory modalities were intact. Eye exam revealed slight bilateral papilledema. This case refers to this and the next 5 questions (11-16). Dizziness, nausea, vomiting and ataxia are tell tale: