New Movie Can Make You Sick [VIDEO]

Word has it JOSEPH GORDON-LEVITT'S new movie is causing people to VOMIT at theaters . . . not because it's bad, but because it's TOO REAL.

The movie "The Walk" is about a French tightrope walker named Philippe Petit, who walked across a wire between the Twin Towers back in 1974.

The movie was shot in 3D . . . and apparently that's one dimension too many for some people who have vertigo or a fear of heights.

One viewer told the "New York Post" "The last 20 minutes of the movie I had to look away a couple of times because of the sensation of the height.  I felt a little bit queasy.  I felt nervous.  It was a tingling sensation and some anxiety." Another said "The reports of guys vomiting in the men's room after 'The Walk' [are] true.  I witnessed it, and came close [to being sick myself].  It's a bad visual trigger for vertigo sufferers."

If you're going to see "The Walk," you may want to bring some Dramamine.