Hello, when you inflate balloons or inflatables, it sometimes happens that you need much lung power to do that. It may be because it is very hard to inflate something. Also it is possible that you want to inflate as fast as you can for example when doing a blowing competition against another person. Or you do the inflation under difficult conditions, for example I have already inflated an air mattress when I was lying on it at the same time what is of course more difficult than without a person on top of it.
What was for you the hardest challenge in inflating anything by mouth you ever have done? Why it was so difficult? What were you inflating at that time?