Battlefield 3

You can get the achievement by starting a new round of conquest on Epicenter.
Head to the Charlie-Flag named "Crossroad" and crawl directly east from it into the pipe.
Some meters inside is a dinosaur statue.
Look at it for some seconds and you should unlock the achievement.


For further discription watch the video from "[P]ure [E]scalation [G]uides" below.

This is agent2498 from the A98Clan with a Battlefield 3 achievement from the Aftermath DLC called Bite the finger. What you need to do to get it is to find the secret reptile on the Epicenter map. This is a lot easier when playing Conquest because you will have the flags guiding you and the dinosaur is located very near flag C.

So, approach to flag B and you could either pass through it in direction to A and then turn left or pass behind the flag and take all the way through the street, or what used to be a street.

When you get to the blue container, keep ahead and on the left is flag C and on the right is an aqueduct. Get in there and probably two meters away you will see a dinosaur. Knife it and the achievement will pop up.

here is a link to a youtube video to show you how to get Bite your finger Achievement in Battlefield 3 If you liked the video please remember to leave a rating, helps me out a lot :D