Oh yeah! High five for the Spetsnaz. I prevented a duo of Nuke Boosters from achieving a Nuke.

The lowdown is this:

One person has Scavenger (a perk which refills ammo from a dead body) whereas the second player has to have a Tactical Insertion (a grenade which respawns you on its location wherever placed).

So there they are killing each other away with the leaderboard looking very suspicious with one guy holding 25-0 kills and another with 0-25. Surprisingly the next thing I hear is a countdown to a Nuke. I quickly leave the game and fortunately end the game in the process thanks to the crappy Host Migration that Modern Warfare 2 offers.

Take that cheaters!