I think that no one is perfect, and nearly everyone has a story where they stepped over their own line briefly in a moment of lost control. Now, the 'line' is different for everyone, and it's better if the line is pretty far away from the actual abuse/ not abuse line.
I don't believe that abuse/ not abuse line should be 'the line' we adhere to, I think grown up behaviour shouldn't come down to the wire like that (eek, lines, wires... Maybe I should also throw in a tightrope too for more mixed metaphors!)
Here are two good (ish) stories and then one bad (ish) one.
I will say I am blessed with DS, who is a naturally obedient and 'good' child (so much that I worry a little bit that he'll get squished by other kids when older).
And also, I'm disabled, so can't do the physical hands on stuff around controlling him, so in a way, avoid things getting too out of control as I can't parent like that in the first place. What I would have done with a more non consist child I have no idea!
The only thing I did right with the 'bad' incident was that afterwards I apologised to Ds, which I feel is a really big thing. My parents never apologised no matter what they did, and I think it sends a powerful message.
Showing a child that adults can be wrong (occasionally!), that they are human, and that they model the right behaviour afterwards, saying a proper sorry and understanding the wrongness, and then learns from it... This is a good message.
Story one: humiliation in the park!
I have only once lost control of Ds and I lost dignity and had to lie / sprawling sit on the pavement just putside a park to contain him, but I didn't retaliate - he was determined to run into the road and kept trying to run off and avoid me catching him, and after 10 mins of trying and failing to 1. Catch him 2. firm 'no not safe. We NEVER run into the road' 3. then distract ... He ended up in the road (a step or two, close to danger and it scared the hell out of me)... And I grabbed him and held him as he had a massive tantrum... For an hour. With me looking like a total bitch who'd lost it, lying with him on a pavement. Was horrendous :( and it crossed my line, but was the right thing to do.
The other time was that tricky one: teeth brushing.
I had to literally get him in a headlock and hold his jaw open to brush his teeth. It was awful and waaaay beyond my line. It felt like I was abusing him, crushing of the body integrity and houndary stuff thats so important... and I hope I never have to do that again :(
His teeth were suffering because of his refusal and I had been shown how to do the head lock thing by two dentists (I wasn't sure so went for a second opinion and got the same advice). I realized that being a parent sometimes means prioritising long term health over everything. So medicine and teeth are something so important that I had to do something I really didn't want to. After that first time, Ds realised I wasn't going to back down and he gave up. Still conflicted about that though...
And the bad example, this is when I did lose it and I'm not able to justify it. Shame is big with this one.
Ds father (abusive stbxh) came round to visit Ds (the last time he ever saw him, I had to protect Ds obviously)... and instantly went to sleep on the sofa and I came in to a scene where the adult had neglected Ds and put him in danger (as he was effectively home alone). Ds had scribbled on the wall and used printing pads (indelible ink) all over the white fabric dining chairs (landlords).
I got back early (thank God), but I lost it and screamed at Ds and Stbxh all at once - bad idea, wasn't thinking, I was out of control - scared that Ds was left alone really, but no excuse. Stbxh couldn't be arsed to wake up and I was screaming at him saying 'look what you've done' etc. Stbxh lost it back at me and got really aggressive, and I removed Ds and me to the bedroom as it dawned on me I'd run headlong into a situation that wasn't safe.
I apologised to Ds afterwards, but I still feel terrible that I lost it and screamed and shouted in front of him, at him, and that he saw adult bad stuff that I should have avoided. He saw two adults put of control and i bet it was terrifying. Then he saw he cry too. It was horrible. Poor Ds :(
I think this shows that the physical stuff (in my examples) is nowhere near as damaging as the emotional stuff :(