Denmark Police

This happened when I was in Denmark. I have a friend there who is working in some Danish company. As he is also Marathi, there was kind of closeness among us, so I used to do leg pooling. In Denmark, if you get call from some number which is not already store in your mobile, you can't see the number, instead you get it like call from 'Unknown'.

Now one evening, when I was as home I was just thinking about what to do and got this idea, so I called my friend and this is our conversation..

Me - Hi, Is it Mr. XYZ?
Friend - Yes, who is this?
Me - I am calling from Norrebro(place where we used to stay) Police Station. Where are you now?
Friend - Actually I am travelling home from my office, Why? What happened?
Me - Okie... Can you come to my office tomorrow?
(In that time my friend was in full tension...He was not sure what happened? And that to something serious as Denmark Police calling him).
Friend - Yes, I can do that. But can you tell me what happened?
Me - Yes, I have a complaint against you. You just meet me tomorrow morning..
Friend - Yes, I will do that....

And then ... after guessing his state, I started laughing loudly. Then he realized... oh, this is me......and he also started laughing...
I don't think he will ever forget this call... After coming home he gave me 2-3 kicks just like that... that was one of the coolest movement...

I know its not good to do such kind of jokes with somebody, but if you are sure that you will make it joke and keep it away from seriousness and you know the person well, I think its perfectly ok.