European matter is the most ordered, with particles staying in their lowest energy states except when accelerated to speeds faster than nearby particles. American matter is somewhat ordered, with some particles maintaining their lowest states. However, some particles, particularly older ones, tend to randomly drift into higher energy states without the speed needed to maintain that state. This creates bottlenecks and can increase the viscosity of American matter until it moves at the speed of molasses. MC matter consists of poorly defined, meandering energy states.
Particles move at random angles in all directions, arbitrarily bouncing into various energy states.
American matter has been successfully reduced in temperature to a state of near absolute zero - the point where acceleration and velocity are both near or at zero. Automotive physicists, being quirky, named this low-temp. American matter also behaves in odd, yet predictable ways. For instance, it is a well known fact that as the number of available energy states expands, the number of slow-moving particles expands to match the number of available energy states. The result is that some slow-moving particles will move into all the higher energy states available, creating the molasses effect whether there are 2 or 6 energy states.