What's your WORST parenting mistake?

[Convergent]

Just that, really! I have an 11 month old, and I constantly feel like I'm f*cking up one way or the other, so please 'fess up to your sins for the greater good and enlightenment of us poor beginners...

Too many to remember. I started reading this thread thinking of a fairly minor one and only remembered the horrendous one half way through. Amazing what you forget.
So that was - she fell out of the open window of the camper van onto fairly hard grass/soil at 18 months. DP had opened it, I didn't realise it was open. Blues and twos to hospital - she had sprained her wrist, thankfully no other damage. It was dps birthday.
Didn't realise she could kick so much at 10 weeks - she kicked herself off the sofa while I was faffing about with the sling.
Getting impatient with her - see that mountain over there, no, ok see that gate post, go up from that, that one. Over and over again, birds, mountains, deer, all sorts of things. Before realising last year she was sooo short-sighted - just like her mum and dad. Who'd've thought?!

Losing DS1 (then aged 16 months) in the middle of the desert in Egypt! We were at an oasis, multiple hazards including an uncovered hot spring and stairs to a flat roof you could walk straight off; I thought he was with DH, DH thought he was with me; suddenly realised neither if us had him and he had completely disappeared....worst ten minutes of my life until he came toddling round a corner with a big grin on his horrid angelic little face. Never again!

Dd has fallen off sofas and beds so many times that I've stopped panicking and started dusting her off and giving her a quick cuddle, and the number of times I've accidently knocked her into door frames >.

In an attempt to save myself from falling down half a flight of stairs after I lost my footing I just almost rugby threw dd out to grab the handrail. Small babies bounce dobt you know

I once put DS in the pushchair in a rush and forgot to strap him in, halfway down the road I bumped up the kerb and he fell out. Before I knew what was happening I had run over him with the pushchair The man walking towards me gave a very look.
DS was fine, me less so gibbering wreck just about covers it.