四の字を固めてもいたずらで済む貴重な日　【アンケート　ハロウィンで許されるいたずらは？】

A precious day on which you can get away even with locking up a Figure Four by calling it a trick.

[Survey: What tricks are forgiven on Halloween?]
• Dressing like a ghost and scaring people
• Tickle punishment
• "Kanchō":http://en.wikipedia.org/wiki/Kancho
• Locking a Figure Four