What Would Romney Do?

Reading the morning news, this little vignette about Fred Thompson at the Iowa Christian Alliance meeting struck me:

At one point in the receiving line, a man’s Huckabee sticker fell off while he was shaking Thompson’s hand, so the former Senator picked it up and playfully slapped it back onto the man’s chest.

This seems to capture Thompson perfectly: gentlemanly, courteous, etc. I wondered what other candidates would do? What would Mitt Romney do? Maybe he would crack a weak joke or just ignore it. Maybe, internally, he would attribute it to the "family poltergeist that has haunted my ancestors for generations."