I have never had ECT but when I was in hospital last my room mate was receiving ECT and everytime she would come out of the anesthetic in a rage (very disorientated, trying to rip out I/V and the blood pressure thingy.. you could also hear her screaming from the room ) she mentioned this to the ECT nurse and was just told that it was how she reacted to coming out of the anesthetic and it wasn't anything to worry about..

hope this is helpful to know you are not alone and if you decide to do ECT again I wish you all the best and it goes well.