MW2 self imposed challenges.

[Shurikens and Lightning]

So I am getting bored of the game and started in my mind making challenges to keep the gameplay fresh. Here are some of mine:

The Gandalf: On skidrow do not let a single enemy pass through the other side of the center building.
The Serial Killer: Marathon, Lightweight, Commando: must only do knife kills and throwing knifes.
The Terminator: Use a LMG and hipfire Pro and never look down the scope. Never run and walk slowly.
The Deflector: Shoot a crate off course with a rocket. Is that even possible?
The Turtle: Riot shield on back and Prone the whole match.



These are some of my challenges but I am more interested in what you think a good self imposed challenge would be.

 

[Furioso]

Glad to hear another person thinks the game is already boring, to add one:
The Saving Private Ryan: After running out of ammo for all your guns try to kill someone by throwing a grenade at them for an impact kill (replace "grenade" with "helmet" for the saving pvt ryan part of this)