This is not a story anywhere near PJ. Just sharing my experience.

Back in high school I was mandated to participate in a camping trip in Janda Baik, Pahang as per our extra curricular activities. I was not a camping person back then so I was less enthusiastic about it. But I went along anyways.

The location was at some forest (I cannot recall) and the camp lasted for 3 days. On the first day, everything was a-okay. We did flying fox, river crossing, jungle tracking etc all the fun stuff and everyone seem to be having a good time.

The freaky bit comes on the next day. There was this activity (I forgot what it was) that were needed to be completed on that very day. Because of some issues the activity was delayed and only started around 2pm. Since the activity was longer than usual and it was strictly needed to be finished, we went ahead until it was almost 7:30pm.

The ustaz there warned the teachers that you shouldn't be doing stuff during Maghrib (dusk prayer) time. Towards the end of the activity, one of the girls started having hysteria and were ranting all over the camp. The hysteria kind of spread and it started affecting the other girls. The whole camp was full of shrieking and girls shouting. They had to be taken into a Surau nearby. They were very hard to be controlled, their eyes were closed shut but they are able to run around shouting and screaming every which way. It was havoc all around the camp.

Once they were taken into the Surau, the shouting calmed down but they were still hard to be controlled. The remaining campers assisted in anyway they can, but still needed at least 5-6 abled-bodies to control just one high school girl, and they were more than a dozen of them. One of the ustaz there started citing verses of the Qur'an to each of the girls. At the beginning of the citation the girls started shouting even louder and I could hear some of them calling in Malay "Kakak!" and others "Adik!!" like siblings or some sort. The whole thing was freaky deaky.

After a while the girls start to open their eyes and all the shouting receded. The girls who regained consciousness were extremely tired and started to sweat and breathing heavily as if they had ran a 10km run. That night all the girls slept in the Surau.

The next day we started packing. It was not only when we got onto the bus that the teacher explained what happened. The ustaz there told them that during yesterday's activity they inadvertently invaded a "spirit" family territory. It was a family of sisters. And they only attacked girls who were on their periods.

Overall, that was an unforgettable experience. The sound of the screaming still ring in my ears.