"Oh shit, oh my god," Lex groaned, helping Addy so that she was sitting on the curb instead of sprawled in the road. Then she sat next to her, leaning against her side to support her. "You just fell down! Did you break it? Do you want me to check? Can you wriggle your toes?" She craned her neck to get a better look.
Should she? It was her best friend's ankle, surely it was selfish not to help when she had the power to! Wouldn't she be a good person worthy of friendship if she helped??? It was the right thing to do! She'd be wrong to leave someone suffering!