I just have to ask this as I have wondered for years and am never really brave enough to ask my own dentist. I can't use nitrous oxide. They tried many years ago and instead of making the world a happy place I freaked out, panicked, and just KNEW they were trying to kill me. I broke equipment and even bit the dentist. OH MY!!! They finally got oxygen on me and got me calmed down. I am NOT a violent person...this was very scary and strange. So, my question, have you seen this reaction? Am I alone? Everyone talks about how great it is!!!! I feel like a freak of nature or something!!!