http://www.readability.com/articles/jsgjiydn
The seats move back and forth, up and down, and side to side. Their backs vibrate. Pressurized air provides either a steady breeze or quick, startling bursts. Nozzles spray water into your face. Lights on the walls flash and machines pour steam into the auditorium. (Two features advertised as part of the 4DX experience were absent from the Iron Man 3 showing: I never smelled anything out of the ordinary and I didn’t see any bubbles. ) But the bells and whistles distract from rather than enhance the film, leaving the viewer exhausted rather than enthralled.