sounds like my son, i always gotta almost scream his name because ifi just say no or stop it he will just continue on and shriek and laugh so i gotta sound mean when i say stop it and he usualyl stops but then crys loud and screams then i say be quiet and he whines but not as loud. mostly he is into pulling hair lately and the dogs tail. some kids are crazy. he used to bite but has stopped that i dunno how he just found something else to interest him i guess, he used to hit when he got mad to but i tell him off for that if he doesnt listen right away i tell him to go to the corner where he will cry and come out when he is done crying. usually doesnt last long lol. now if he gets mad he hits his head on the coffee table, i try to ignore it so he will stop it cuz he started it a while ago then stopped but is doing it again.