When my son throws a fit in the store or when we are out to eat my husband puts him in timeout no matter where we are(embarassing!) but it works he screams and crys but we ignore it (or pretend too) eventually he realizes nothing he is doing is working for him and he says hes sorry and completely changes his ways.(hes 51/2 been doing this since he was 3) we have went from having a fit every time we were out to every once in awhile. some kids are just there to push you lol. he is one in five and up untill a year ago he was the baby so I assume that had a lot to do with it b/c the other ones never did this. we even went to a behavior specilaist. they said to keep doing what we were doing and to first explain to him b/4 we went in that these things would happen just so he knew and always follow through on what we said. Hope things get better...