An extremely important aspect of hitchhiking is lunch. There are different ways to provide for lunch. I will discuss one of them.
Some hitchhikers prefer to prepare their lunch in advance.
Needless to say, an infertile thought. What everyone experiences when applying this lunching technique is that the prepared sandwiches actually taste different at different locations. Some people might say this is a psychological phenomenon. This is yet another example of the consequences of the macroscopic form of Quantum Mechanics. Once the sandwiches are prepared and put into the box, their state can be described by a rather complex wave function.