Stuck in the Loo...

A creepy incident happen to me yesterday night. In the afternoon, my dad called and say don lock his toilet door if I happen to use it, coz its faulty. When I went back hme, my mum reminded me again nt to close the door.

So ok everything was fine throughout the day and I went to bed. Then I began hearing banging on the door outside. I thght my mum was trying to fix the faulty door by using a hammer. So I juz ignore and continue to sleep.

The knocking was persistent and I thght my mum was trying to be a repairwoman again. Awhile later, my phone rang. It was an unknown number. So I picked up the phone.

Here's the conversation.

Me: Err hello~
Stranger: Hi. Is tis Pasir Ris
Me: *initially thgt it was a wrg number* err yes.
Stranger: I tink ur mum is stuck in the toilet~.
Me: err ok.

Hanged up.
My Mind was thinking is tis a prank call or smth.
Got off my bed and went to check.

Went to my parent's bedroom. The door was locked. Open it and my mum was indeed trapped inside it.
I was feeling super -------------_______________--------------
She told me not to close the toilet door and end up shes the one getting herself lock inside. U guys can go ahead and laugh. its ok. I find it amusing as well.

And I gt scolded for nt checking out the noise. -_-She say what if smth happen, so i shld check. Bt then again, i was told not to close the toilet door. So I presume no one will get stuck because everyone is inform of the faulty door. So izzit my fault for nt checking? i really don noe. Paradox of assumption i guess.

Ok the creepy thing is who exactly is the mysterious caller who inform me, tat my mum is stuck in the toilet. How exactly did she noe my hp no? and whether is tis pasir ris?
I attempted to return the call bt its a deadline.
The call remains a mystery. Act of instinct? really dono.