I have a grandfather and a very good friend who are ISTJ's. I don't think my friend has ever seen me show any sort of feelings/emotions (and I get the sense if I ever did show much emotion he wouldn't know what to do), but my grandfather has - when I've been in very difficult situations in life or when we've been at the bedside of an ill family member, etc. Whenever I, or another family member has cried in front of him, he seems to look the other way as if to say, "Oh jeez. What do I do now?" In the case of the ill family member in the hospital, I could tell by looking at him that he was very much affected and feeling something, but he remained very composed.
Also, with a couple of ESTJ family members, they also seem a bit uncomfortable when someone in the family cries or gets upset. Come to think of it, I've seen my ISTJ grandfather cry one time in my life, that I can remember, and the ESTJ male family member twice (both instances involved someone passing away). I only remember my ESTJ sister crying once when I told her that I really cared about her more than she knows. Even in these rare instance, the crying/emotions were very controlled.
What is the thought process when someone cries or in heavy situations? Is it the "get me outta here - anywhere but here" type of feeling? Or is it more like, "look at this panzy - can't he control himself?" Or something entirely different?