My sister was giving plasma then fell on the floor, was curled up in the fetal position (involuntarily), hands curled, mouth wide open, almost seizure like, couldn t talk or move, only tears streaming down her cheeks. After about 3 minutes she finally came to and said she could feel the whole thing and remembered it all, just couldn t move and her whole body just curled . She started crying as she was scared. She felt trapped in her own body. Any thought of why this would happen or what caused it? Maybe a seperate issue just triggered? The ER couldn t find anything wrong. She s been having migraines since and has never had migraines previously.