Excursion class is the most dangerous English lesson ever taught.
Terrible things can happen to students but you are warned in advance so you can't complain.
If you soil your gown when you milk a cow the school will not pay for laundry expenses.
Students will have to pay their own bill for refreshments...
... or for cheese
You can ask for a refund if Inge, the teacher, is eaten by a refrigerator, but only if she is eaten during the first half of the class and doesn't come back within 5 minutes.