What did William Shatner have to do to speak the volcanic greeting?
In which country are there exotic trees that change when they grow?
Answer: Fishing line role as Captain Kirk, but there was one thing he just could not handle. The iconic volcanic greeting.
In the rare instances where Shatner had to perform the traditional Vulcan greeting with V-fingers, the stage crew used a barely visible loop of fishing line to tie his ring and little fingers together to help he separate his fingers in the right formation.
It's a joke with Shatner and interviewers that he can not keep the greeting, as many fans of the show can. For example, in an interview with Conan O'Brien in 2009, Shatner showed him how bad his attempts (without a fishing line) were, and O'Brien proudly showed him his perfect volcanic greeting.