Well, I deserved this. Went to see a two hour action movie with a friend that we were both looking forward to and I neglected to wear earplugs out of embarrassment and a false sense of security when the initial preview didn't seem too loud. Even after the non-stop action started I still didn't use the earplugs. That along with the loud subway ride home seems to have spiked one of my tones in the left ear now. I took NAC before the movie and after but it didn't seem to help either. I think this is the last time I'll be watching a movie in theatres, with or without earplugs.