I was preparing to film myself rolling my eyes back, but when I set up the camera I discovered that unbeknownst to me my eye was throbbing! (Technically the throbbing is probably coming from a vein underneath my eyeball) I started filming the phenomon with no idea how long it would continue, since I've never noticed my face do this before! The throbbing was virtually undetectable to me and if I had not been filming my eye anyway, I would have never known that it happened! The visible pulsing continued for about 10 minutes but I only got just over 3 minutes of footage that was good enough to upload