Looks like the jet from the movie “Hot Shots”
They used one SIAI S-211 and also Folland Gnats/HAL Ajeets in Hot Shots.
S-211
http://www.flugzeuginfo.net/acimages/s211_johannesossenberg.jpg
Gnat
http://img152.imageshack.us/img152/7783/hotshots1no9.jpg