The Mysterious Ticking Noise

What is the mysterious ticking noise?
not over here.. not over there...
its kinda.. catchy..

Snape, Snape, Severus Snape

Snape, Snape, Severus Snape

Dumbledore!

Snape, Snape, Severus Snape

Dumbledore!

Snape,Snape,Severus Snape,

Dumbledore!

Snape,Ron, Snape,Ron, Severus Snape, Ron Weasley

Dumbledore!

Snape,Ron, Snape,Ron, Severus Snape, Ron Weasley

Dumbledore!

Snape,Ron,Hermione Snape,Ron, Severus Snape, Ron Weasley, Hermione

Dumbledore!

Snape,Ron,Hermione Snape,Ron, Hermione Severus Snape, Ron Weasley, Hermione

Dumbledore!

Snape,Ron,Hermione Snape,Ron, Severus Snape, Ron Weasley, Hermione
Harry Potter Harry Potter Ooh! Harry Potter Harry Potter Yeah Harry Potter Harry Potter Ooh! Harry Potter Harry Potter That's me!

Dumbledore!

Snape Harry
Snape Harry
Snape Harry
Snape Harry
Snape Harry
Snape Harry
Snape Harry
Snape Harry

DUMBLEDORE!!!
...Hermione

Dumbledore!

Snape,Ron,Hermione Snape,Ron, Severus Snape, Ron Weasley, Hermione
Harry Potter I'm Harry Potter I'm Harry Potter Harry Harry Potter

All: Singing a (our?) Song All Day Long at Hooooooooooooogwarts! Yeah!

Ron: I found the source of the ticking! Its a Pipe Bomb!
ALL : YAY!!!!

Voldemort song:

*evil laugh*

Voldemort, Voldemort, ooh volde- volde volde

Voldemort!