video
https://www.youtube.com/watch?time_continue=26&v=KwXcZa3LfYY
Its not clear if it was toilet paper, a napkin or just a sticky and persistent piece of paper, but whatever it was detached itself from his foot at the top of the staircase:
Shhh! A sticky note:
“Remember to tweet:@SecPompeo had a good meeting with Chairman Kim today in Pyongyang. Progress made on Singapore Summit Agreements! I look forward to seeing Chairman Kim again, in the near future. pic.twitter.com/bUa2pkq80s”
That or:
“BK Confirmed. Sleep tonight, Pain tomorrow!”