Yeah they do. On Saturday Nights.
To give you more general information on Trigun, rather than specifics...
It takes place on a desert planet named Gunsmoke (at least according to the description on the back of Disc 1, it never says the name of the planet in the series, probably information from the manga) which is entirely desert, and is obviously not Earth due to the fact that there are two suns and five moons. The civilization is straight out of a wild west film, only the people ride large flightless birds called Thomases rather than horses. Oh, and quite a few of the villians have extravagant weapons, genetic alterations, and cybernetic enhancements, such as DeCarte's cybernetic arm and Dr. Nebraska's three-story tall "son".
Vash the Stampede is an outlaw, wanted throughout the planet, and accused of mass destruction. Entire cities that have been utterly destroyed have been attributed as his work. He is said to be a savage killer, a vicious outlaw who kills for fun and wants nothing more than to rain destruction and death upon the land. To fight with Vash is to dance with death incarnate, and only a fool would throw his life away trying to track him down.
However, the truth is that Vash is both a pacifist, and a complete dork. Hyperactive and over-emotional, he in no way could be mistaken for his stereotype. However, bad luck follows him whereever he goes, and property damage on various scales somehow simply happens whenever Vash is around. However, Vash believes very strongly in the sanctity and value of life, and would never kill or wish death upon anyone. Although his ideals are sorely tested throughout the series by his brother Knives, who is Vash's opposite in almost every philisophical aspect.
An excellent series with equal parts dramaaction, and comedy, engaging characters, superb animation overall, and a storyline that continues to grow as the series progresses, Trigun is a title I would recommend to anyone.
I conclude with this link, which I hope will help you somewhat.