Yes Pit Bulls can suddenly turn on their owners for really no reason.
I had a Pit Bull for 5 years and he was usually a very nice loving dog and I always treated him really good and never harmed him in any way.
But one day he suddenly decided to try and turn on me and attack me when I went to go feed him outside.
I was able to get away from him luckily or he could've killed me with the way he was being really aggressive and trying to get through the fence to attack me.
I had to go inside the house and get my gun and shoot the Pit Bull before he got out and either attacked me or attacked someone else.
I will never have a Pit Bull dog again just for the reason he was really nice and then 5 years later suddenly snapped and wanted to attack me.