NBC News --
A woman was taken into custody after hurling what she said was a shoe at Hillary Clinton.
It was during a speech in Las Vegas, and the former secretary of state was quick with a witty comeback.
The bizarre incident happened just moments after Clinton took the stage Thursday at an Institute of Scrap Recycling Industries meeting at the Mandalay Bay Hotel and Casino.
The former first lady, 66, ducked, but didn't appear to be struck by the flying object.
She quickly joked about the incident.
Clinton quipped: "Is that somebody throwing something at me? Is that part of Cirque du Soleil?"
She added: "My goodness! I didn't know that solid waste management was so controversial. Thank goodness she didn't play softball like I did."
Ilene Rosen, a witness and the wife of a conventioneer, says the unidentified object-thrower walked down the aisle and got roughly six rows from the front of the seating area when she threw the object.
The woman then turned around, threw her hands in the air and walked toward the back of the room before ushers surrounded her, Rosen said.
Security officers escorted the woman out of the room.
She said she threw a shoe but didn't identify herself to reporters or explain why she did it.