Once in a whie Spock and Uhura deadpan argue/discussing in sign and everyone standing there like 😶 watching those really fast hand movements in awe. Them being at an allied planet where the main form of communication they could do with the local population is sign language

so watching his captain's hands do signing all day means Spock has to go lie down from being 50 shades of flustered often. 😏 I also like imagining the lil personality differences in their signing too.. Since Uhura is a talented comms officer her signing would be super clear and fast if need be.