Interesting MW2 Facts (Thanks too gagarin)

Sentry Gun has 1000 points of health.
Explosives deliver 7x their damage against a Sentry.
A Melee attack or a Throwing Knife will instantly disable the Sentry.
The Sentry has the potential to fire continuously for eight seconds.
It recovers fully in four. If it "overheats", it will take eight seconds.
After 90 seconds, the sentry will destroy itself if the enemy has not done so.

The UAV and Counter UAV have 700 health and hang around for thirty seconds.

Both Helicopters have 1500 health, Chopper Gunner has one flare countermeasure.
The Pave Low has one flare and 3000 health.
Unlike the helicopter in COD4, these three will decrease bullet damage to 0.3x all the time.

Both the Precision Airstrike and Harrier Strike deliver the same payload.
Three (two for Harrier) jets fly by and drop a bomb that breaks apart and releases ten bomblets each.
Each cluster bomb has an explosive radius of 512 inches, with damage of 200 at the center to 50 at the edge.

The Harrier that hangs around has 3000 health and cuts player damage against it in half.
Luckily, some will instantly kill it (or at least really hurt it).
A Stinger, Javelin and other killstreaks (like the remote missile and AC130 guns) will instantly destroy it.
The RPG7 and AT4 will do a specific amount of damage - the Harrier's max health minus 900.
The Harrier will hover in place for 45 seconds.

The Stealth Bomber drops a lot of bombs.
Each of them have an explosive radius of 896 inches.
They deliver 300 damage at the impact point and 50 at the edge.

The AC-130 apparently only has 1000 health.
This is offset by two flare countermeasures and immunity to everything except lock-on Launchers.
It lasts 40 seconds. All three guns are available. They have a reload time of:
25mm = 1.5
40mm = 3.0
105mm = 5.0

Claymores have:
0.75 second delay after detection. Scrambler Pro increases the delay to 3 seconds.
192 inch detection range.
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