It happened December 29, 2010 in the Canadian park Goldstream. Local river water suddenly glowed neon green. Ofigevshie people rubbed my eyes to make sure it's not an illusion. River pleased unusual color for about an hour, then again became normal. After analyzing the green water, the local Ministry of the Environment said that it was the result of getting into the chemical «fluorescein». Neither he nor his decomposition products are not toxic, and experts hope that the fish and ecology of the river were not affected.