Having participated in a Yoga class earlier today, I have noticed, and not for the first time, an interesting phenomena: when the class instructor directs the participants to chant OM at the start and end of the class, some of the more seasoned practitioners seem to hold the vibration sound longer than others. While it is completely possible that they do this just because their lungs are more developed, or that their capacity for projecting sound is deeper, it sounds to me like a little war is going on. I can hear an undertone of “Ha! See?! My Om is longer than your Om.” “Oh yeah? Let’s see about that: Ommmmm…mmmm…mmm…m..m.”
Who knew Om can be so violent?…
Learned from: observing chants during a yoga class
Open Heart Energy 
The key is to just start a little later than anyone else 😉