I think that Palm Pilots (and so probably Treo phones) just ran the apps in-place (from the flash memory or ram). So if you pushed the "calendar" button it just switched to running it. No loading involved.

It doesn't look level compared to the water in the bath.

I think that it's tilted and the jar is held at an angle to disguise that.

I recognized that because the instance my account is on is named after it.