This link here will show you the other version of reverse thrust that pops 2 doors over the back end of the engine to redirect the airflow forward, incidentally the likes of most military fighters such as the Tornado use this design, if you see a picture of one, you will tend to see a lot of soot staining on the vertical fin, this is because of this air flow being redirected forward.
NationMaster - Encyclopedia: Thrust reversal
