The description of this video calls it a “test drop on March 3, 2010”, but Tanker 911 appears to be dropping near a fire. It happened in the Enfield State Forest, near Ballarat, Victoria, Australia. It may be described as a test drop, because the use of the aircraft during their current summer fire season is considered a “trial” to determine how effective it would be down under.
I can’t get used to hearing jet engines while an air tanker is dropping.
And speaking of fire videos, here is a link to a YouTube slide show of “vegitation fire” photos. The pics are pretty good; the music is loud and annoying.