Felix himself isn't surprised, because he hasn't noticed anything strange about his behavior. She emerged victorious, it's now his duty to serve her. That's completely normal, right?

As they approach the carriage, he tries to speed up to get there first so that he can help her up into it, but he's too slow under the circumstances and he scowls in frustration. "This is supposed to be my job," he grumbles, but he is still in pain, so he does accept her help.

He sits - gingerly - facing her in the wagon and studies her for a moment. She looks relatively content, he thinks? Covered in sand, though - that's probably uncomfortable. With a faint grunt, he gets up again and shifts to sit beside her instead so he can hold the ice with one hand and use the other one to begin brushing sand off of her as best he can, beginning with her shoulder and arm.