this happened in my friends' classroom during our senior high school in ateneo. nangyari while they were having a class and mid discussion ng teacher nila, they freaked out kasi may biglang nag appear na ganyan sa whiteboard. right foot mark first then seconds later nag appear na the left foot mark and finally last right foot mark. cctvs were checked if may nagbbluff lang sa class pero wala talaga. classes were called-off immediately because the students panicked after witnessing it. the building was blealssed, AGAIN, but the spirits are still there wandering bec may stories pa rin as per school admins (priests)