After doing Kursk_1, and you are on the church you can rocketjump INSIDE the lowest tower-top. Sorry, not able to show atm but its easy. (@ 125 fps).
From there : Invurable to everything, but you CAN see and shoot everybody
Yeah lol dont have cod here@work computer. My boss doesnt like it, no idea why But i have cod on laptop here and that one is without internet because of novell proxy
Can't post it right now, sorry Maybe somebody can record it... just rocketjump from the church onto the smalles tower of the 2... easy