Sunshine wants to help Indica blow up her first hot water bottle. Indica is a little nervous about exploding such a thick rubber vessel, so Sunshine agrees to use the floor stands. But in her excitement, she forgets to install the check valves - until Indica asks what is going on! Once things are put right, the next surprise is that master inflater Sunshine gets shown up by her student as she races ahead. She lets Sunshine catch up, and both end up popping very close to each other. The pressure recorder shows why Sunshine tended to lag behind - her bottle required noticeably more pressure, ...

Sunshine wants to help Indica blow up her first hot water bottle. Indica is a little nervous about exploding such a thick rubber vessel, so Sunshine agrees to use the floor stands. But in her excitement, she forgets to install the check valves - until Indica asks what is going on! Once things are put right, the next surprise is that master inflater Sunshine gets shown up by her student as she races ahead. She lets Sunshine catch up, and both end up popping very close to each other. The pressure recorder shows why Sunshine tended to lag behind - her bottle required noticeably more pressure, even as it behaved largely the same in other respects.