3 ms·That's interesting, and I'm curious why someone would know this. Are you in the field?by j88439h84 7y agoThat's interesting, and I'm curious why someone would know this. Are you in the field?shakna 7y agoI started getting cluster headaches a couple years ago, so it isn't true anymore, but I used to have a photographic memory. Useful for picking up lots of entirely useless information.j88439h84 7y agoI see. Thanks for sharing that.