Kendra has had a great day at the Lab, setting the all-time blowing pressure record at 4.7psi, and blowing her first Chinese hot water bottle, among other feats that few women (or men) have ever achieved. She is tired, but really wants to try one of the thicker Ukrainian-made hot water bottles that are popular with strongmen throughout the Russian-speaking world. She actually has three of them, but having read Zonah's report on the increased pressure requirements of the smaller ones, she opts to try the largest size first. What could go wrong - tiny Zonah popped one in less than 20 seconds!...

Kendra has had a great day at the Lab, setting the all-time blowing pressure record at 4.7psi, and blowing her first Chinese hot water bottle, among other feats that few women (or men) have ever achieved. She is tired, but really wants to try one of the thicker Ukrainian-made hot water bottles that are popular with strongmen throughout the Russian-speaking world. She actually has three of them, but having read Zonah's report on the increased pressure requirements of the smaller ones, she opts to try the largest size first. What could go wrong - tiny Zonah popped one in less than 20 seconds! Well, she is about to come face-to-face with the "pressure wall" - the fact that it is one thing to develop a high pressure into a closed tube, and quite another to push air out of the lungs at that pressure. The size 3 Ukrainian hot water bottles typically require about 2.6-2.8 psi to start, and Kendra gives it her all. Can she make it expand?