Riot police face off with demonstrators at the “Occupy Denver” camp on October 29, 2011 in Denver, Colorado. Following a march by protesters, police moved in on their encampment to tear down recently erected tents. They arrested numerous protesters, pepper-sprayed others and others reportedly fired rubber bullets at the crowd during the confrontation. (Photo by John Moore/Getty Images)

A protester is sprayed with mace by riot police after throwing a chair through a window of a business during the second night of demonstrations after a not guilty verdict in the murder trial of former St. Louis police officer Jason Stockley, charged with the 2011 shooting of Anthony Lamar Smith, who was black, in St. Louis, Missouri, U.S., September 16, 2017. (Photo by Lawrence Bryant/Reuters)

A rainbow forms on water from a spray machine used to suppress coal dust at the Krasnogorsky open pit coal mine, operated by Mechel PJSC, in Mezhdurechensk, Russia, on Monday, July 19, 2021. Russia’s government is betting that coal consumption will continue to rise in big Asian markets like China even as it dries up elsewhere. (Photo by Andrey Rudakov/Bloomberg)

Indonesian firefighters spray disinfectant at the public area near an elephant enclosure at Ragunan Zoo prior to its reopening this weekend after weeks of closure due to the large-scale restrictions imposed to help curb the new coronavirus outbreak, in Jakarta, Indonesia, Wednesday, June 17, 2020. As Indonesia's overall virus caseload continues to rise, the capital city has moved to restore normalcy by lifting some restrictions, saying that the spread of the virus in the city of 11 million has slowed after peaking in mid-April. (Photo by Dita Alangkara/AP Photo)

Florida Division of Forestry fire fighter, Tim Abramczyk, sprays foam on a hotspot that flared up as he works on containing a 50,316-acre brush fire on June 10, 2011 in West Dade, Florida. The fire started last weekend as South Florida continues to endure a dry start to the rainy season and drought conditions have begun to appear. The forestry division has the fire about 55 percent contained. (Photo by Joe Raedle/Getty Images)

Workers harvest cranberries from one of third-generation farmer Larry Harju's bogs in Carver, Massachusetts, U.S. October 14, 2016. The cranberries from Harju’s farm are a part of the 8 million barrels of cranberries Ocean Spray anticipates is grower-owners will produce this year. (Photo by Brian Snyder/Reuters)

Street art started out as unintelligible words written on concrete walls with spray paint by gang members or silly kids. Now, however, it evolved into a unique form of art that might stun and inspire awe in the onlookers. For example, the artist that goes by the name 1010 specializes in creating optical illusions. His creations look like portals into other dimensions, without any hint that it might simply be a flat concrete wall painted over with multicolored paints. These pieces of art are so good that it is hard not to reach out into these ‘holes’ to find out whether or not they are real. (Photo by 1010)

Artist Princess Tarinan von Anhalt throws paint into the flow of air coming from the engine of Flexjet’s Learjet 40 XR engine to create a painting on a canvas at Signature Flight Support in West Palm Beach, Florida. The artist associated with the Jet Art Group used the help of Flexjet and their plane to spray paint on a canvas to create distinctive paintings to celebrate the 50th anniversary of Learjet. (Photo by Thomas Cordy/The Palm Beach Post)