its all in the eye contact. if you can look them in the eyes (from a distance if they're totally freaked out) and project calm and confidence, I find that usually does the trick. I haven't had to use the Vulcan mind meld very often but I think providing reassurance and THEN help is a pretty good approach.
Also, for some weird reason, putting your hand gently on the top of someone's head when they are in distress seems to work, as well. Obviously, don't use this on the surface elsewise they might think you are trying to drown them.
Also, for some weird reason, putting your hand gently on the top of someone's head when they are in distress seems to work, as well. Obviously, don't use this on the surface elsewise they might think you are trying to drown them.