Mystery rain (?)

Mystery of mysteries - I woke up, they predicted rain at some point during the day, but I could detect none.  Yes, I am longing for rain.  Seized the day, went for a morning run.  Came back, and, in one of my favorite fashions, stepped out to the terrace to cool off.  And dripped sweat onto the pavers.  But, on closer inspection, there seemed to be drops on some of the leaves - how?

The cracks between the pavers had that once-wet-but-now-almost-dry appearances.  But those can be deceptive; sometimes I forget the regular grey coloring and shadowing, and, especially if almost dry so that I cannot even confirm by touch, I forget the coloring, and confuse it for evaporating moisture.  But the drops on the leaves, those were real.  But from where?  If I didn't know better, I might hypothesize that water caught on the roof membrane underneath had somehow projected itself upward - but that couldn't be.  Or did the cooler disgorge its liquids again?  Who knows.