isn't it weird that they didn't check if she was dead?

I'm rewatching Catching Fire and I found it so weird that, near the end of the movie, while Joana is taking Katniss away from the boys, these two tributes show up, and then Joana knocks Katniss down and all, but she runs opposite, not towards them. they saw Katniss and they are careers lol they know better to check for her pulse, since not hearing the cannon and since they could pursuit Joana after making sure Katniss was dead right? am I missing something?