Wearing an armored flak jacket, one soldier willingly lined up to receive a kick from the legendary light heavyweight champion, and, well, it didn't go so well.
While the armored vest can usually stop bullets, the force from the kick definitely knocked the wind out of the soldier.
As Elias Capeda notes at the Yahoo Sports blog, other fans have volunteered to get punched or kicked by "The Iceman" in the past.
UFC host and correspondent Megan Olivi captured the video and put it on Instagram: