By Adam B. Vary
August 17, 2009 at 11:55 PM EDT

The website set up to handle ticket requests for Friday’s 15-minute free preview of Avatar crashed for much of Monday due to the high volume of fans visiting the site, reports the Associated Press. The special extended preview for James Cameron’s highly anticipated 3-D sci-fi adventure will be limited just to IMAX theaters nationwide, but the regular trailer is also set to premiere on iTunes and in theaters this weekend.