How should I handle my 2-year old's tantrums in public places?

If its a shopping mall, ill carry him to a corner, if its near my house for instance on the way to school. I wont give in, i handle it there and then. Watched a clip of supernanny. Lol. So my boy cried and refused to walk, he wanted to be carried. In the end, he gave up and it never happened again. All i did was stood my ground, till he was calm and explained to him after. Sounds easy, it takes a lot more patience then i ever imagined.