Quoting Mommy of a giggler!:" Are we talking like a fast walk type of run or an all out run? If she was in an all out run, I can see ... [snip!] ... might be a little overboard, but if I were the employee I would have stepped in front to block her way and told her not to run."
even that would have been unacceptable, you just simply say stop runiing. Especially in Walmart. They have strict rules about stuff like that. If you have to tell someone a few times to stop running then that's when you get management in it. There is no need to grab a customer, or even touch them in anyway at all no matter the age.