Hello and welcome, It is highly likely a stretch syncope. Stretch syncope is caused by hypotension (low blood pressure). During a stretching the pressure increases inside the chest which decreases blood flow to the heart and eventually decreases blood pressure. Low blood pressure causes low blood flow to the brain and a person experiences visual blurring, light-headedness, numbness etc. Stretch syncope has a good prognosis. You should avoid provoking action (stretching). But if you experience altered state of consciousness (reduced wakefulness, disorientation, difficulty following commands etc) after the stretch this might indicate neurological problem (probably temporal seizure). If you do have altered state of consciousness you should see your doctor. You might be ordered EEG or other tests to find out the cause. I hope the above information will be helpful for you. Please, feel free to ask me if there is anything else you need to know. Thank you, Malik Amonov MD