Shali bahn was a term in the Vulcan language, an expression that literally was translated to mean the calm before the storm. To Vulcans, it was the clarity of vision that was experienced both internally and externally in the time preceding death. In 2268, Spock wondered if the lucidity he was experiencing while being hunted by Hamesaad Dreen on Beta Cabrini was a variation of shali bahn. (TOS novel: Legacy)