Hmm, sorry I guess I'm not being very clear.

It's not that she's asking us to be mindful of the past perse, but we're to reflect on an event/situation/interaction.

So for example, I'm currently still trying to work through a relationship that I had, so sometimes during class I will try and work on "overcoming" it (because I tend to constantly reminisce over it). So I'm suppose to simply observe the feelings that come with this person, so then I can try and see what comes with them, and so then (after mindfulness) I'll be able to try and not get myself upset over them.

Picture the movie screen analogy. I can visualize this person (for example), and see, ok this person elicits x y and z from me - but I don't actually FEEL x y and z.. i just acknowledge them without judgment.

Does that help at all?