Two incidents yesterday........  
First incident....
A 'Blocked' mobile call
"may I speak to Nikki?"
"Speaking..... Who's this?"
"It's blah! blah! blah! from blah! blah! blah! "
Oh dear! It's a COLD CALL!...... I only answered the call because I thought it might have been an urgent call from family, friend or work! I hate cold callers with passion!
So my wicked mode kicked in.
I let her rumble on for a couple more minutes even sounding interested
"I'm actually in Tenerife right now......' And before I could say anything else.......CLICK! 
That'll teach her!