We are on day 1 of the Oh Crap! Method of potty training and it is leaving us all traumatized. Our son freaks the eff out whenever we try to sit him on the potty. He fights it so hard we have to force him to sit down and last pee he fell backward and hit his head on the window sill. I know the book says to keep going and that since he is in the age window he is ready but I feel like physically forcing him to sit down is just going to traumatize him. He's really hard to calm down after using the potty and it's killing me to see him so upset. He likes putting his sticker on the chart when he's finally calm and will talk about peeing in the potty but when the time comes again he freaks.

Any tips? Was anyone else's child this resistant?