I love waving hello to people I haven't seen over the summer, having their eyes glance at me and look away...only to swivel back and do the sudden jaw drop double take.
I'm getting a lot of "you look fantastic/amazing..." but I think my favorite was when I bumped into an acquaintance I hadn't seen for a few months, and they stared at me in silent shock for a few seconds, and all the could get out was "Emily...your body!" Made my day.