How you tic tac is by using you shoulders in order to maneuver yourself steering left and right. It's much like hillside-toeside on a snowboard. You're rocking back on your heels, you're leaning on your toes except with tic tac you're using your shoulders to turn, move your weight into your hips and you guide that into your feet.
It's much like going snowboarding when you're leaning hillside or toeside except with this you're putting a little bit of weight on the tail so that way you can go left and right. You're going to use the momentum from your shoulders channeling, guiding them down to your hips and from there to your feet.
Now, when you lean back a little bit, you don't want to lean too far back but if you put pressure down you want it to be towards the ground. When you go left and right you want to be in control. You don't want to go too far to the right or too far to the left. You want to be just right. Not too big and not too small.
So everything just needs to be taken easy. You go left, you go right, you use your shoulders. Make sure you get that energy into your hips and soon enough you'll be flying down the street. Think about it like a rotor on a boat. It's going to propel you forward or much like a snake, gaining momentum. That's what's going to help you do a tic tac.