I knew someone who was mistakenly awake until right before they were to administer the shot; they gave her the paralytic but forgot the sedative that day--but when they administered the paralytic they always blocked her right arm so that if something went wrong and she was conscious she could signal by squeezing someone's hand (was supposed to be a nursing student that day) who wasn't at her hand.
They were even bagging her with a bag-valve mask, breathing for her. She began moving her hand frantically, squeezing at air. Someone finally saw her movement just before they were about to shock.
She understandably said after that that she was never going to have another ECT treatment again, after that. I saw her both before and after each treatment, and she did have short-term permanent memory loss that didn't seem to significant to her at the time, btw. I pointed out to her the irony that if they hadn't noticed her hand movement and had given her the shock anyway, there was a good possibility the shock would have erased the memory of it.
Yes, she appreciated the irony and was comforted by that possibility if they'd gone through with it, but was understandably way too terrified to have another one ever again.
Did she feel that they had helped her, at least short-term? Yes, she did. But I lost contact with her a good while ago and can't vouch for her feelings at this point.