Exclamation used to express the feeling of personal jangling frustration experienced when everyone around you is being an idiot and there is the desire to shoot them in the head and tell them all to get the hell out of your space. Effective in getting them out of your space, emotionally. Liberation. Forceful separation from the emotions of others.
In non-exclamation form, could be used to express the urge to remove oneself from situation-that-cannot-be-avoided. Usually turning into exclamation form.