The fire knife is a traditional Samoan cultural implement that is used in ceremonial dances. It was originally composed of a machete wrapped in towels on both ends with a portion of the blade exposed in the middle. Tribal performers of fire knife dancing (or Siva Afi or even "Ailao Afi" as it is called in Samoa) dance while twirling the knife and doing other acrobatic stunts. The towels are set afire during the dances thus explaining the name.
The Siva Afi was Originally performed with the Nifo Oti ( Samoan war club ) which is very dangerous as the steel of the Nifo oti heats up and burns . The modern fire knife dance has its roots in the ancient Samoan exhibition called "ailao" - the flashy demonstration of a Samoan warrior's battle prowess through artful twirling, throwing and catching, and dancing with a war club. The 'ailao could be performed with any warclub, and some colonial accounts confirm that women also performed 'ailao at the head of ceremonial processions, especially daughters of high chiefs. During night dances torches were often twirled and swung about by dancers, although a warclub was the usual implement used for 'ailao. Before the introduction of metals, the most common clubs that were wielded and displayed in the 'ailao fashion were elaborately carved heirloom clubs called "anava." These 'anava were frequently carved with serrated edges and jagged "teeth" which characterized the unique Samoan weapon called the "nifo'oti." When European and American whalers and traders began commercial ventures in Samoa, they introduced the natives to the long-handled blubber knife and the hooked cane knife. The characteristic metal hook of these tools was readily incorporated into the Samoan wooden nifo'oti, which bears the unique hooked element whether carved from wood or forged from steel. One common claim is that the word "nifo'oti" means "tooth of death", but this is not linguistically accurate as Samoan syntax places the modifier after the subject; according to Samoan grammar the term "nifo'oti" would actually mean "dead tooth," hardly as intimidating as the former translation. One more linguistic issue remains to be worked out in regards to 'oti (with the initial glottal stop) and "oti" (without the glottal stop). When pronounced with the glottal stop, the word 'oti does not mean "death" at all; as a verb, 'oti means "to cut" as in 'otiulu ("hair cut") or as a noun it refers to the domestic goat. Therefore, the most probable derivation of the term "nifo'oti" stems from the resemblance of the weapon's hook to the curved horn ("nifo) of a goat ('oti), or from the serrated teeth ("nifo") that formed the weapon's cutting edge ('oti).
Fire was added to the knife in 1946 by a Samoan knife dancer named Freddie Letuli, later to become Paramount Chief Letuli Olo Misilagi. Letuli was performing in San Francisco and noticed a Hindu Fire eater and a little girl with lighted batons. The fire eater loaned him some fuel, he wrapped some towels around his knife, and the fire knife dance was born.