A movie from maybe the 90's with semi trucks that have teeth where the grill is...?

[RustynsMommy]

I have no idea what it is...it may even be just part of a movie.
I just remember it from when I was younger and no one else seems to know what I am talking about.
Its not a big deal...just bothering me because I cant figure it out.
Anywho, I hope someone can help!