妈咪，我出事了

On Tuesday, I got a call with the caller saying the above twice, I thought the person must have called the wrong number...but it sounded quite scary though...

Then abt an hr later, I heard colleagues talking abt it...seems like the caller has been calling every extn...thus, we conclude it’s a prank call...

Here are some suggestions 'contributed' by colleagues on how to answer:
~ where are you, I ask 警察爸爸去接你.
~ where are you? Tell me, I go n find you (just to ‘entertain’ the caller :p)
~ when did I have a son, I only have daughter :p
~ hello, this is the police station, where are you calling from?