Do you think after Clarke finally saw Lexa fight, and absolutely kick Roan’s ass she paused for a moment and thought of all the times she had clearly underestimated Lexa’s strength. She obviously knew Lexa was powerful from meeting her, but it was more the power that Lexa commanded than her personal skill. And now Clarke just has a moment where she remembers backing Lexa into a table, spitting in her face, holding a knife to her neck, and she realises just how badly that could have ended for her. So she has a little ‘oh shit’ moment… And then an even more profound ‘oh shit’ moment when she remembers all the times Lexa let her threaten her, never lifted a finger against her, and how much that says about Lexa’s feelings for Clarke.