For those of you who aren't acquainted with the intricacies of the Rhineland dialect, "D'r zoch kütt" means "Der Zug kommt" or "The parade is coming". The first tractor usually has a sign announcing this so that the people can start getting into position.
Position? What's the best position to watch a parade?, you ask. It depends on who you are and why you are there.
The children each leave with a couple of bags full of candy which they will dump out on the living room floor (reminiscent of American Halloween rituals), sort the edible from the inedible and then commence to beg their parents if they can have "just one more".