It is true that looking up at the sky and watching the clouds move can give the impression of being on a boat sailing past a stationary troposphere, however, this is not actually the case. The sensation of motion is merely an illusion caused by the clouds moving while the observer remains stationary. This illusion is created by the fact that clouds move faster than the observer can perceive. While the clouds seem to be passing by steadily, the observer is actually standing still, and the clouds are passing by at a faster rate than the observer can detect.

It is also important to note that the troposphere, which is the layer of the atmosphere closest to the Earth, is actually not stationary. The troposphere is constantly in motion due to the effects of the sun, wind, and other weather phenomena. This motion is undetectable to the casual observer, but it is nonetheless present.

Therefore, while it is understandable why someone might get the sensation of being on a boat sailing past a stationary troposphere while lying on the grass and looking at the sky, it is inaccurate to say that this is actually what is happening. The clouds are moving faster than the observer can detect, and the troposphere is not stationary.