Bhagavad Gita, Chapter 18, Verse 24

But the action which is performed desiring desires, or with self-conceit and with much effort, is declared to be Râjasika.

Real stress and real pride are named here as the visible markers of this second mode of action.

Krishna doesn't need to describe passion-mode action abstractly, he names its actual felt qualities, strain and self-importance. Real texture, not just category, is given to this mode.