ETA: I did it!
"Today (8/5/2011) at Trader Joe's around 2:30 pm. I was the big girl with curly brown hair, sunglasses and a t-shirt and jeans. You were the big guy who offered to take my cart. You smiled at me and said, "You kids have a nice day!". Was there a spark there? Reply if there was."
Is it too cheesy? Not specific enough? If he replies I'll update in TQC updates.