Could have been a setting on the tv/blu ray player like 24fps or 48fps will make flicker.
What tv does he have? Brand and model number, not all 3d tv's use shutter glasses.
A weak before I watched a movie in my cousins 3d tv at his home.
The whole experience was really good enough, but I've noticed a kind flicker there while watching the movie.
My best guess is, that's because of picture quality, but my bro told me that he got the original print of the movie?....flickering is not because of movie, he said it's because of some technology disturbance. But don't know the exact reason?...
My concern is if someone knows about it then let us know, why flicker was there in his 3d tv?