Hi Yogini, That sounds exactly like cataplexy -- not uncommon with us. It is sort of similar to "fainting goats" (have you ever heard of those?). Some people have narcolepsy with it, but not all. Do you have any signs of high intracranial pressure (the feeling of fullness in your head, nausea, dizziness, vertigo, sensitivity to sound, light, motion and/or stress, tremors -- worsening with Valsalva (straining), do you get motion-sick easily? All can be signs of slightly increased intracranial pressure. I just wonder if that is the cause of your cataplexy....