Well. There may be a fairly decent reason for some staring going on right now, mightn't there? Granted, L has never exactly been adept at keeping to social norms. He knows them well enough; he just doesn't have time for them.

But that's not the cause of this particular staring contest. No, L is just trying to reconcile what he's seeing with the world as he knows it. Hmm. Shouldn't the past stay in the past? It definitely should. It's not a dream though -- if only because he doesn't sleep long enough to have this much of a dream.

Hm.

"I wonder if that's potable. Though... I guess you'll find out now one way or another." And so will L, by observing the unplanned experiment -- unplanned, but not an un-useful one.