There is a clipping exploit in the "Road to Jalalabad" Battlefield 2 map that allows one to get inside a rock near one of the bases (Outpost). The player is hidden, and any bullets fired at the player will simply hit the outside of the rock. The exact location can be pinpointed from the screenshot:

 

Link

 

Credit goes to [myg0t]JediPimp for sharing this information with the community.

I've used a couple of times :naughtyd:

very old

Any tips on how to achieve it?

That's awesome.

Gotta try it.

I'm guessing you jump and get yourself wedged?