Feed back on the day at the camp of PLKN

"My story about the old hostel" has make me to feed back on the day when i'm staying at the camp at segari(PLKN).The day after we came back from the forest......all the trainees have to gather at the field.Suddenly,one of the trainee have cried out loudly and she started to hysteria,trainer quickly carry her to the hall.But we still can heard the sound comes from the hall,she still under the hysteria.After that, trainers ask all of the trainees to gather all the bed and slept together.The day after the day,i'm still remember it is a rainy day.Trainers have to stop all the outdoor activities,we were forced to gather at that hall.Suddenly,all the trainee who satting behind the hall have started to hysteria.Some of them who even felt faintness.The other trainee all appear faint hearted.I dont know what was happended to them,i'm just sitting beside them when they getting hysteria.I dont felt anything at that moment.Some of us have ask to the trainer about this,but the answer they gave was:"nothing was happend,dont think too much about that,they getting hystetia as they feel under stress."I know that the trainer have to hide up something and they dont want all of us to concentrated about that.But i'm really want to know WHY they hysteria.Is it they really saw something that we cant see......Or they just like what the trainer told us that they all are under stress.