Cloud watching with an HMD

Below is a comic strip, not an instruction manual, but I guess it is possible to try this at home. Some notes after the comic strip.

Normally, when placing stereoscopic cameras or rendering a virtual image, it is important to try and match the actual distance between the eyes. That's why 3D camera rigs try to minimize the distance between the cameras, which are pretty large:

Having said that, there is no depth perception in such a large distance as looking at the clouds, so substantially increasing the distance between the eyes might create some 3D effect.