Yes, I did, once, it was awful.
I fought having the black rubber mask held over my mouth and nose as the gas was turned on and made me feel as if I couldn’t breath. The dentist and nurse held me down and clamped the mask on me as I struggled and screamed, I must have been about nine.
Obviously it worked and knocked me out so the tooth could be extracted, and I came round.
The dentist was very cross with me and shouted at me for upsetting the other patients who could hear me in the waiting room, as could my mum.
I was terrified, my mum was angry with the dentist for the way he behaved and gave him a piece of her mind, and we changed dentists.
To this day I can still smell the horrible rubbery mask and the gas.