Not hardly, kids do not throw public uncontrolled temper tantrums when they are 3 years old, that's just BS.
Can they be grumpy? Sure... Tired? Absolutely... Cranky? You betcha.. off schedule? Certainly.. but the idea they will throw themselves to the ground kicking and screaming because of it?? Nope, that's a learned behavior.
Child that age pulls that, parent should IMMEDIATELY pick the child up, take them to the nearest facility and tan their hide, and tell em point blank that is NOT acceptable behavior. Or even better, if you are in a situation where you can do it.. just walk away.. its amazing how quickly little susie or johnny stop acting like that when they know mommy and daddy won't put up with it.
Sorry, but this is not a normal behvior.. our children each tried that crap ONCE.... and learned its not accepted, and mommy and daddy are not going to bend over backwards because you are doing it. At 3 they are old enough to know better, not setting a precident to where you act that way and suddenly mommy and daddy are going to stop everything just to try to bribe or cajole you... that sets the absolutely wrong precidence.
Given the fact this mother admitted openly "She has her moments" clearly tells me this is not the first time this has happened... so, no I'm not buying bad timing... if it was the first time it happened perhaps I'd cut some slack.. but based on that no way... flat out poor parenting.
You have to scare the pants off your little ones or they will be in control. If my finger comes out and points at them they know it's time to quiet down.
But Dr. Spock (Or what ever that wimps name is) is gospel to a lot of (Dem) moms.
*I* tried that crap once... learned it from the little girl across the road. For my efforts I got a hiding and had one heck of a sore butt. Action/Response Feedback Loop.
Same here I have 4 kids myself,same deal. Several years ago one of them started something like that just when we we where walking into walmart or someplace like that. I grabbed him by the shoulderss and looked him straight in the eyes and told him in a quiet but Very stern voice that if he didn't "Knock It Off" I was going to SPANK him in front of all these people! Then I asked him,Do You Want To Get Spanked?!.. I could almost see a tear forming in his eyes and he said no. That was it never happened again.