What is 4-D cinema?

What we see today are two-dimensional movies with multi-channel sound. In three-dimensional movies, viewers are required to wear special glasses which creates 3-D images of objects. ‘Chhota Chetan’ and ‘Shiva Ka Insaaf’ were such movies released two decades ago. Fourth dimension in a movie creates a different experience. Besides the 3-D effects, viewers can experience the movie through other senses like sight, sound, odour, touch and also have personal remote control. The seats have bass shockers and other fittings which make the 4-D experience possible.