hMm.. it depends on where you saw them.. if it is in a restaurant in a mall.. hMm.. i'll grab someone i don't know and ask her to eat with me... hahaha.. that would be awkward.. if it would be them roaming around.. i'll silently follow them <like stalking>., and when i confront them i'll act weird saying that it was a co-insident that we met and i would obligly ask her who is that guy and kick his *** <pardon my french>... =p