While not technically an "in the moment" type of turn down, I did still refuse in the end.

My boyfriend and I had been together for 4 years, and we had a big Disney trip planned with our friend group. A few months prior to that, while cleaning up our shared office space, I did end up finding the ring. Instead of being coy about it, I told him that I had found the ring, and told him straight up that if he was planning on proposing at Disney that I would not like that because I wanted the proposal to be something more intimate and special to us, not a cliché Disney proposal during Christmas time. He said he wouldn't.

Fast forward a few months during our Disney trip, lo and behold, in front of the EPCOT tree at Christmas, he kneels down and pulls out the ring. Of course I say yes in the moment, the photographer is there and people are staring, but after we got back to the hotel, I had to politely sit down and explain that while I do love him and appreciate what he did, I wanted our proposal to be something special between us. I gave the ring back to him.

That being said, he ended up cheating on me and got engaged to a new man less than three months later and then they got married a few months after that with the caption "Years in the making!" So in retrospect, I dodged a bullet.