Mommies throw me a discipline bone please!

What the heck happened? Where did my pleasant little man go? I would like him back please. But I have a feeling it will take a lot more than praying to St. Theresa (Catholic thing) to get him back.

We skipped the Terrible Twos. I sat back and watched with pity and perhaps a smidge of envy as my friends went through it with their kids. For some reason, my little guy was an angel. Not sure what we were doing right or wrong at the time. But that time has officially passed.

Cases in point:
1. The other day: In the park, little boy his age standing on some wobbly beam thing. My little guy makes a move (though not quick enough) to stealthily push him off. The horror! Same park, the kid's father standing on said beam. "Get off!" exclaims my little man while trying to push him off.
2. Parent's Tea at School: Having to leave. Him not wanting to leave. Making a big show of not wanting to leave. Me being utterly embarassed while trying to NOT get angry and exercise patience. I somehow managed to do both, but damn it was hard.
3. Friend's daughter's basketball game: Repeatedly running out onto the court DURING THE GAME. Me mortified. Him, couldn't care less. I even had this "We can't go over the red line" thing going. Not denying him totally but setting a boundary. It worked for awhile and then he broke away and made the mad dash (me with too tight jeans and a sweatshirt riding up my back exposing my flesh scrambling after him...what a sight).
4. Today: Pick up the little man from school. He doesn't want to leave. "Jag vill inte gå!!!" (I don't want to go). I manage to distract him with whatever I was saying to have him trudge alongside me towards the car. We run into a mother. I stop to chat. He keeps going. I yell after him, "Slutta nu Joseph!" (Stop now!). He looks back in defiance and smiling and makes a beeline for the road WITH CARS! I cut the conversation and start sprinting. I was pretty scared to be honest. He scared the shit out of me. A car could have easily come around the cul-de-sac and beened right into him. I was mad. No, not angry. I was MAD and frightened. The exchange went something like this:
"When Mama tells you to stop, you stop. This is dangerous. A car could have come and hit you and then we would have to call the ambulance and go to the hospital and bye-bye YOU. Mama is very angry right now. blah, blah, blah. DO YOU UNDERSTAND? (scowling face for effect and well, because I meant it)." Raised voice but not screaming because I am, after all, in Sweden. He says, "Ok Mama". He realizes I'm quite serious. We get into the car. My monologue continues and then I fall silent, unable to get the vision of my son getting hit by a moving vehicle out of my mind. He is silent, waiting for the storm to pass. Insert "cut-the-tension-with-a-knife" analogy. I told him not to bother asking for candy today because he behaved badly and boys who behave badly do not get candy (yup, I realize that whole bribing or rewarding with sweets was likely not the best move).

There's a lot of challenging going on right now. Him defying us, the establishment. I remember when I did that. There was a slap on the ass. It worked. But, I don't want to take that route. I also don't want to be one of those soft Mommies who either gives in or tries to "soothingly discipline" or whatever it is when you see Mothers, whose kids soooo deserve a swift kick in the arse, say and do things you KNOW have NO EFFECT WHATSOEVER.

So please, please Mommy blogger communities, HELP ME. I need some techniques and FAST. I need something consistent because right now, I'm all over the place. Anything with a touch of "fear of God" and a smattering of "serious reasoning" sounds great!