Used to use the phrase 'Excuse me I just trod on a duck'

In China I have got used to the free and easy way that the Chinese fart and burp with no embarassment at all.

My first experience here was a good few years ago when I was demonstrating some test equipment to a mixed group of male and female engineers. They had just had lunch. One young lass was standing in front of me, just as I was getting to the crux of the demo, she burped twice, raised a leg and let rip.

Not a flicker crossed her comrades faces, I had to bite my tounge to stop laughing as this was a new one (at that time) to me.