unusual but cool

So I was walking in wal-mart with a scowl on my face mumbling something under my breath because it was 7 on a thursday and i was out buying cleaning supplies so i could go home and wipe the counters down before i got down on my hands and knees to srub the awful kitchen floors when this woman i've never seen before touched me on the shoulder and said "you should always smile, you're really pretty." I wasn't sure whether i should question her sanity or give her a big hug, So i just said "thank you" instead.