don't recall if it was '76, '77 or '78, showed Creature from the Black Lagoon in 3D. I lasted about 30 minutes before the "headache like being hit repeatedly in the head" burst into life. Taking off the red/blue glasses and getting the heck out of the theatre made it fade away.

That said, I've seen 3d movies at the Union Station IMAX. The glasses technology now is wonderful. Went to the first one with a bit of trepidation, but never any discomfort.