Here are some spoilerific highlights, so don't read this unless "you've finished The Deathly Hallows, don't care about spoilers, are or just a jerk who wants to find out what happens at the end and ruin it for everyone."
Just as Harry finds the diadem, who should show up by Draco, Crabbe, and Goyle.
Draco: Shut up you to.[sic]
Crabbe: WE R IN UR ROOM OF REQUIREMENT MESSING WITH UR JUNK!
Draco: I said shut up.
Goyle: U DO NO B TELLING US WHUT TO DO.
I had to chuckle at this too:
Voldemort: You need to die. You see, the uber-wand that I stole from Dumbledore's grave isn't living up to the hype -- it just isn't giving me enough cowbell, only cranking to 10, not the full 11