Hello, I have had a few spells lately that have me a bit concerned and haven't found any discussions online that sound similar. About 3 months or so ago, I was riding in a car with my friend and out of nowhere had just a sudden feeling only in my head of dizziness. It took my breath away it was so sudden. And I also felt a sort of weird pulsating sensation. Many people have mentioned a pulsating that they tend to describe as electrical. What mine felt like made me think of something from a movie, like a deep body (although only in my head) throbbing. I know this sounds silly but it always brings to mind some movie or book that I can't place my finger on where there was a spaceship that was emitting like a low throbbing/pulsating energy -- not an electrical feeling as I have heard others describe...I'm not crazy, I swear, I don't think that aliens are invading or anything. That is just always what it makes me think of. Anyway, it is so sudden and overwhelming that I just can't even talk or do what I was doing seconds before. It only ever lasts for about 3 or 4 seconds, and has only happened maybe 5 times in the past 3 months. One time happened right as a big dump truck was starting up and the low rumbling sound/feeling of that was similar to what it felt like in my head, and I wondered if it wasn't somehow related, but just 2 days ago at the mall with my daughter, right in the middle of a store where I was just looking at some earrings, it happened. It took my breath, and I just had to stop and stand there for a few seconds. Anyway, each time it happens, as soon as it's over (just a few seconds) I have no ill after-effects, no nothing. I take no medications, have barely any medical history (2 deliveries --13 and 8 years ago, and a ruptured appendix 10 years ago that required exploratory surgery and a chest tube). I am overweight, obese actually. I am 5'3" and 265lbs. I eat a typical American diet, fairly crappy, some healthy stuff. I am 33, work on a computer all day...I can't think of anything else that may be relevant. Anyone at all have any idea what this is? It's not had any lasting effect, but it is rather unsettling when it happens.