Le Notti del terrore (1981) aka Burial Ground

http://us.imdb.com/title/tt0081248/
A professor opens a crypt and reanimates rotten zombies. The zombies attack a jet-set-group which is celebrating a party in a villa nearby.

Small clip but good one. Son played by adult midget groping his mom wanting to feel moms breast again.

Download:
Burial.Ground.avi
8 MB