A herd of elephants thunders towards you. you fall to the ground. their huge feet strike the earth all aro you. no,it's not a nignhtmare or a safari gone wrong. it's a three-dimensional movie, coming to an IMAX theater near you. movies in three-dimensional(3-D) are not a new idea. they were popular in the 1950s. back then,the audience wore special glasses to make the moive pop off the screen. one lens was blne and the other lens was red. today,new technology makes 3-D moive effects amazingly real. here are some of the features that make IMAX awesome.