Best discription I've heard of Salviua was "its like being rebooted - yu just foget everything including yourself and who you are, then slowly bits keep coming back to you"
you get massive time dialation - what seems like hours with your mates looking at you is infact seconds and they're not laughing at you at all.

Just dont useit that oftern - you'll be feeling the background effects of it for a day or so after taking it