To be a Ceremonial Guardsman in the United States Air Force you have to maintain bearing at all times, even if you have a rubber chicken in front of your face. The instructors at the USAF Honor Guard Tech School constantly challenge the new-coming Airmen bearing, and the students pay the penalty if they cannot maintain it.
The twist comes when a police officer squeaks a yellow rubber chicken in each of their faces at random. The goal is for the cadets to remain completely still, quiet. and maintain their bearing and composure at all times.