[Stiles notices something isn't quite right early in the week, and by Wednesday when Bucky nearly jumps out of his skin from a lightening strike and then proceeds to end basic training early, he knows it's time to approach and talk to him. Because he's worried. He's also learned how to spot trauma reactions -- both from his own personal experiences and those of the people around him. They tend to be subtle, especially when a person is more apt to hide what's going on than not and that's basically everyone he knows.
And while Bucky might not be avoiding anyone intentionally, he also notices that he's kept his distance. So he makes his way to his friend's cabin and knocks on the door lightly, waiting.]
Spam
And while Bucky might not be avoiding anyone intentionally, he also notices that he's kept his distance. So he makes his way to his friend's cabin and knocks on the door lightly, waiting.]