The Bingo caller

He sits upon the stage,
Like a King upon a throne,
Calling out the numbers'
for he is never alone,
A shout goes out,
A line is called,
The numbers checked,
There's no time to be bored,
The faces show such concentration,
As silence from the player's is a must,
Just call out my numbers,
Before my card is bust,
They sit there with a dibber,
Crossing out one number at a time,
Until the card is empty,
This let it be mine.