Is it true what I heard about Yoga Cl?

I will be enrolling in a yoga cl. Now I never went to one before but I heard that there is a lot of farting going on during the cl from all the stretching and weird positions. I have even heard someone say once that the word "Yoga" means "Try not to fart"...lol I'm not embarred by it but more curious about what to expect. Is it true that most people will fart during cl?