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You had sudden memory loss
, disorientation while you were skiing. You were feeling disoriented and strange. Also you had headache and also scratches on head and pain in ribs.
Probably you had episode of seizure. Seizure probably Generalized tonic clonic type usually present with symptoms of sudden onset involuntary movements
of limbs, loss of consciousness
for some time. Usually episode last for few seconds only. After episode individual remain confused with fatigue in limbs as due to seizure. Loss of memory for episode occurs because of anterograde amnesia
You had scratches on head and injury because of sudden fall due to seizure.
So as per my opinion visit a good Neurologist
and take opinion regarding episode. EEG can be done to ascertain any seizure activity in brain if any.
Dr. Seikhoo Bishnoi