Huh.  I had a very similar experience...  But instead of forgetting my idea, I wrote it down.  See, I was having a major insomnia attack (as in, I didn't get to sleep until after 4 in the morning), and this random non-quote popped into my head that I had to write down.  Luckily, I keep a notepad by my bed for just such an emergency, and I figured that as long as I was there with the pen and paper in hand, I might as well try to write something up.  I tried to elaborate on the characters you created, but if I interpreted them wrong, let me know.  I pictured Pippa as an energetic, happy-go-lucky girl who was very charismatic and bubbly, but with no sense of occasion.  I imagined Raku as a tall, foreboding African male, very serious and slightly dark.  Basically, the exact opposite of Pippa.  I couldn't get much of a feel for Gwen's personality, but I made her the middle-woman.  I also made it first-person, which, if we keep this, I will change.  As I was absolutely exhausted, this is by no means my greatest work, but here it is:

I lay on the grassy hill, snuggly tucked between my two new friends, Raku and Pippa.  We lay on our backs, staring up at the sky.  

"What are they?" I wonder aloud.  

"What are what?" asks Pippa, her deft hands weaving together blades of grass.  Her movements are so quick and smooth, I marvel at her skill.

"Those small dots up in the sky.  They look like small droplets of water, but instead of liquid, they carry light." 

Raku joins in our conversation.  "Mayhap they are the children of the brighter light we saw in the sky earlier, when the sky was bright."

Pippa and I giggle at the idea.  "But the light we saw earlier was much bigger.  And how can a light have children?  It just doesn't make any sense." I say.

"Well, then maybe instead they are the same as the light earlier.  But they are so far away, they seem much smaller."

I open my mouth to voice a counter-argument, but I close it in silence.  The idea is so very ridiculous, yet somehow it strikes a resounding note deep within me, a note that forbids all debate.  My confused thoughts are interrupted by Pippa.

"But they look so close!" she giggles.  "I feel like I can just reach out and touch them!"  She stretches her left hand upward, as if intending to do so, then giggles again and curls into a ball.  I laugh and reach out as well, my muddled emotions forgotten.  Only Raku remains  somber.  

"I meant what I said."

I stop playing, a thought suddenly appearing unbidden in my mind.  "If our light has... all of this," I say, sweeping my arm to indicate the landscape around us.  "Do you think that those other lights have... have..."  I shake my head in frustration, unable to think of the proper word.  As soon as I search for the answer, however, the question itself disappears as soon as it had appeared, leaving no indication of its presence in the first place, except for a slight lingering feeling of having lost something important, maybe even vital, to remember.  

"Where are we?" Pippa asks, unusually serious.  "I mean, I know where we are, but I don't know where we are."

My lips rebel against me, and move without my approval.  

"Atalaya," they say. 

Raku and Pippa both stare at me and my treacherous lips.  My cheeks color, thankfully too faint to be seen in the softness of the lights above. 

"I don't know why I said that," I murmur.  

Pippa stares for a few more moments, then slowly a wide grin appears on her freckled cheeks.  "I like it," she says.

Raku makes no noise, but his entire body resonates with his quiet approval.  I know without looking that a small smile has betrayed  him as well.  I smile as well, glad that the rebellion of my lips had no major repercussions.  I suddenly realize how heavy my body feels, how great an effort it takes to raise my eyelids.  I fall asleep on the grassy hill, under the watchful gaze of the lights.

I changed a lot from my original, which was sloppy and unclear.  I changed tenses a few times in the original (going from present to past), and I had no descriptions.  Anyway, tell what you think!  Hopefully, I won't have to stay up until 4 am next time I want to write. 

It's okay.  I just like to know why someone is gone for a short period of time.  

This *still* won't get off the 2nd page!!! To the first page, young thread, and you will become a valiant knight like me! xD

...I'm a little tired today....