Here's another great achievement tutorial for Battlefield 3. This one is for 'The Professional', which you get on the level "Comrades". What it asks of you is to complete the street chase in under 2 minutes 30 seconds. Seems easy enough. But if you take in to account all of the bad guys that stand in your way, suddenly the challenge went way up.
Complete the requirements and you'll get a cool 30G on Xbox 360, or a bronze trophy on PlayStation 3. Happy hunting!