I might be mistaken, but I didn't think 391 was denigrating Wallis for his reaction to his injury, but merely reminding us of that moment when Barlow broke his leg. I'll never forget the crowd's (and the commentators') horrified reaction when Barlow tried to stand up and we could see that his leg was on a bizarre angle. Obviously there are varying reactions to injury depending on the nature of the break, or whether the person is in shock or not. It was hard to watch the Wallis incident because he was obviously in extreme pain and it was clearly very distressing and traumatic for his teammates.
Of course, on AFL360 they recalled and replayed similar incidents, but ignored the Barlow break. The thing about his injury is that he was possibly on the way to winning a Brownlow in his first season, the injury cruelled our chances of finals success, and it took years for him to recover. So, like the Wallis injury, pretty tragic and sad.
One can only hope Wallis has a quicker recovery.