My 90 yr. old mother went with two of her friends on easter monday to see Titanic in 3D.  Had to phone and ask her if she ducked when she saw the iceberg looking up, she said no to that but it was the water lapping across the deck had her picking up her feet momentarily and then needing to go to the 'loo' when she came out of the cinema.  Other than that she loved it even the sensation on putting on the glasses - good on yer mum.