For years I'd been trying to find a film (as I remembered it) where someone was being menaced by trucks and digging machines that has come to life. I saw it as a small child, and it scared me, sticking in my mind to this day.
But I couldn't find it. In describing it to friends, "you never saw a driver", I was often recommended to watch that early Spielberg film where the big truck keeps following a driver along a road and trying to kill him. Yeah, it's a good film but that wasn't what I was remembering.
And then, last year, quite unexpectedly, I found it.
It was The Goodies episode The New Office.
There's a sequence in that where The Goodies (Graeme in particular) get chased by digging machines / JCBs with no drivers. And watching it now, as well as having silly bits, it is still quite menacing and scary.