I've seen some people react like they had some kind of super power with it but after two instances where I ingested through my nostril half a gram (2 lines) I'm yet to see any of the typical comments.
lolwut, .5g in two lines is ridiculous, either your numbers are off or you are a masochist. And if you really did .5g and weren't feeling anything more than "caffeine but stronger" then that must've been some really, really low quality stuff.