Good prank call ideas?

I was told: "if your guna do a prank call do it good". A freind told me of this one. First you call a COE or a person with good rank in the company. You find out the owner of the componies last name, then you call the COE and say: we are having a huge insident with the thehardrive and say i need to have every one for a meeting r ight now. Next listen to there reaction and if they so " ok". you say thank you. if they say "no" or "who are you" you say loudly: " ILL TELL YOU WHO I AM IM MR. (owners last nam)S SON AND YOU LISTEN TO ME RIGHT NOW OR UR FIRED! then hang up! pleeze tell me some of your ideas!