Rag Season

On my first day at university I arrived with a fear of ragging. The first three months are called "rag season" and new students are subjected to different jokes and pranks:
--they must wear normal frocks, rubber slippers and are not allowed other decorations;
--they can't use English words when talking to seniors;
--they can't laugh with seniors even if they make jokes;
--they are set impossible tasks but mustn't laugh when doing them (stopping planes by shouting at them, measuring long walls by using tiny sticks, moving fans by blowing at them)