As I was watching anime I heard a very faint knock on the door. My brother was in the bathroom so I wasn't quite sure if it was him or someone at the door. I wasn't expecting anyone so I walked to the door and listened closely. I heard a girl's voice. I decided to open the door and it was Liisa. She immediately exclaimed "Give me candy!" I told her that if she comes to perform this Finnish Palm Sunday tradition which is very close to trick or treating that is common in some countries during Halloween. She tried to prevent me from closing the door and started yelling for help but I managed to close it almost immediately after that. My brother came out of the bathroom a bit later asking me "What the fuck was that?" I just responded with dismissive "I don't know." and changed the subject very quickly.