The "crap cannon" is a device that emits a musical sound that produces uncontrollable bowel movements in human beings. The television show Mythbusters ran an episode disproving this urban legend in 2004.

1. Crap Cannon also known as the "Brown Note"
2. Supposedly used for crowd controlFOXNews.com: Activists Preparing Against Use of ‘Brown Note’ at Dem Convention
3. Reportedly a military weapon<refname="FOXNews.com">FOXNews.com: Activists Preparing Against Use of ‘Brown Note’ at Dem Convention(June 11, 2008)
4. 2004: disproved by Mythbusters
5. No sound found to cause gastro-intestinal convulsions
6. Relegated to urban legend status
7. Parodied by popular animated show South Park

1. Protesters preparing to attend the 2008 Democratic Convention are getting ready for police to use crap cannon against them
2. Re-create 68 founder Mark Cohen believes crap cannon is real
3. Cohen cites "eye-witness" accounts of the weapon's use in Miami in 2003 for his beliefs.FOXNews.com: Activists Preparing Against Use of ‘Brown Note’ at Dem Convention(June 11, 2008)
4. U.S.Government gave Denver $50 million for security
5. Re-create 68 members believe money is for ultra-sonic weaponFOXNews.com: Activists Preparing Against Use of ‘Brown Note’ at Dem Convention(June 11, 2008)

The Discovery Channel show, Mythbusters, ran an episode debunking the crap cannon back in 2004. While some sounds were found to irritate the bowels, none produced the reported effect.

• South Park Studios: Crapped Themselves to Death Clip (Time: 3:19)

• YouTube: Spoof of Mythbusters Brown Note Episode (Time: 4:03)