William Shatner sat down with Conan on "The Tonight Show," and ended up flipping off the host on Wednesday night.
After a few oddball stories about getting felt up by airport security and once getting pulled over while speeding when wearing his Captain Kirk uniform, Shatner manually tried and failed to manipulate his fingers into the classic 'Star Trek' greeting.
Conan made fun of his inability to do it, and then started plugging Shatner's books and talk show before saying goodbye.
As Conan offered a final, perfect Vulcan hand salute to Shatner, Shatner flipped him off.WATCH: (Star Trek hand off starts 2/3 in)
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