If you ever hear anything that sounded like a long creepy groan coming from the toilet of fifth floor around 2 or 3am in the morning, please do not freak...there's no momok/hantu/mahluk ghaib/syaitan/bobohijan.......
It just me n my habit of letting out super long heavy sighs like.."HAAAAAAAAAAaaaaaaahhhhhhhhhhhhh" after Im done with my showering.