okdude ;
I was! searching for that movie for a very long time too, the semi-truck scene is also what I remember only, Thanks for the car tip...

so what I did after I read your topic and recalled this scene I searched most movies of Dabney Coleman's filmography, Luckily it was full of Tv series and non of the his movies was that movie

So I got back to to basics and I searched at youtube as alfa romeo spider crash

And ı came up whit this :
http://www.youtube.com/watch?v=rG8YrwZ5W3A

this :
http://www.imdb.com/title/tt0064041/

and of course, this :
http://www.imcdb.org/movie.php?id=64041

it was blurry image from my childhood
so, thanks for the spider tip again