Mom at church using force to keep her two small children from leaving the nursery area when she left to rejoin the service. (The nursery is staffed by paid sitters during the service.) She left the nursery and basically physically pried her kids off her body. And this was her action of first resort. It wasn't like she told them "Okay, I am going to go back in and I will see you soon" or "Please let go of my leg because I need to go" and they continued to protest and cling. It was more she stood up, they followed her to the door, and she then turned around and started pushing them back. At least one of the two would likely respond fine to one of the above statements or something similar, just based on my other interactions with the child.
I've seen a few other things from this family that make me raise an eyebrow, but as was said upthread, you only see a slice of anyone's family life, could be a reason, today could be an exception to what they usually do, etc. But this does make me sad to watch, and this isn't the first time I've seen something similar happen either. I just don't think this is very fair to the kids. (Also, if she did this in front of other adults, would she do worse in private?)