My friend was really ill when I took her to watch We Bought a Zoo. She had just recently been in hospital but insisted she was fine. I kept saying "are you sure you want to see the movie tonight, we could go another time..." but she was adamant she was okay. But sure enough, after downing half a bucket of popcorn and a large fizzy, she started feeling really sick and kept moaning about it to me and our other friend. I was like..."here's the keys, go wait in the car"
Even though that movie sucked balls (and was so sickeningly over-the-top and sentimental it probably onsetted her nausea) I still wanted to see what happened at the end.
In conclusion, if you're sick - stay home! Don't expect other cinema-goers to suffer for yor foolishness.