Wikipedia Article of the Day: "Exploding Cigar."

"The customary intended purpose of exploding cigars is as a form of hostile practical joke, rather than to cause lasting physical harm to the butt of the joke."

Although far rarer than their prank cousins, exploding cigars used as a means to kill or attempt to kill targets in real life has been claimed, and is well represented as a fictional plot device. The most infamous case concerning the intentionally deadly variety was an alleged plot by the CIA of the US in the 1960s to assassinate Fidel Castro. Notable real life incidents involving the non-lethal ilk include an exploding cigar purportedly given by Ulysses S. Grant to an acquaintance and a dust-up between Turkish military officers and Ernest Hemingway after he pranked one of them with an exploding cigar....

A well known use of the exploding cigar in literature, for example, appears in Thomas Pynchon's 1973 novel, Gravity's Rainbow....  Other book examples include Robert Coover's 1977 novel, The Public Burning, where a fictionalized Richard Nixon hands an exploding cigar to Uncle Sam...

Film examples include... in The Beatles' 1968 animated feature film, Yellow Submarine, where an exploding cigar is used to rebuff a psychedelic boxing monster... Appearance of exploding cigars in the Warner Bros. cartoon franchises, Merrie Melodies and Looney Tunes was fairly common, often coupled with the explosion resulting in the pranked character appearing in blackface. Some examples include: Bacall to Arms (1942), wherein an animated Humphrey Bogart gets zapped by an exploding cigar leaving him in blackface...

Let's look that up.... oh, my....



ADDED: I like this scientific demonstration: