Have you ever been extremely, nervously upset or panicking and you suddenly have this "calm" come over you....where everything suddently seems in the distance and nothing matters for a brief while? That's the disassociation. We get it, but it's primarily related to strong emotion. There is an entire disorder with it's own forum on PC. Those people are more like they are asleep while awake and then suddenly realize that they have no clue where they are or what they're doing. When it comes to BPD, it's not that bad but you can lose time. You ARE aware of what you are doing so you're not likely to do anything completely stupid, but you can lose memory if it's bad enough.