In this tutorial I will be telling you guys how to get 30,000 xp for two perks amazingly quick. This is a good strategy to do if you're finding it quite hard to level up during the higher levels. To do this tutorial you will need to have the Dead Silence Pro and Extreme Conditioning Pro perks.

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Instructions for Extreme Conditioning Pro

1. Make any class with Extreme Conditioning Pro on it. Walk up to an object that prompts you to press A (Xbox) or X (Playstation) and climb on to it.

2. This will count as a mount towards your Parkour challenge which have various xp that can be awarded. Keep climbing onto dustbins or walls and these will count as mounts.

3. Before you know it you will have mantled about 250 objects which will give you 10,000 xp for completing the Parkour challenge.

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Instruction for Dead Silence Pro

1. If you have Dead Silence Pro, you will know that you don't take any falling damage. MW3 has the challenges called Featherweight, this is what it says 'Fall x amount of times that would have normally caused you damage while using Dead Silence Pro. So any jump that would originally hurt you, won't do so and you will unlock challenges for it.

2. Find a staircase or a high jump that you can jump from.

3. Jump down a certain amount of times and you will start to unlock 10,000 xp challenges. There are 6 parts to the challenge which have larger XP than the next.

4. Eventually you will have fallen 100 times which will result in 10,000 xp being awarded.

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All the challenges from Parkour and Featherweight 1(I) to 6(VI) will amount to around 60,000 xp and will only take a couple of games to complete.

This is not a glitch as it's implemented in the game.