I've got two old Volvos two old Subarus and an old Ford Ranger. If you've got an old car you've gotta have at least several old cars 'cause one's always gonna be in the garage.
With 'Good Will Hunting ' Miramax made certain the recruited audience wasn't expecting to laugh at Robin Williams like they normally do. From my limited experience you can really blow test screenings by conducting them in the wrong way.