the episode where homer takes some form of Hallucinatory drug from some hippies, he has visions of the marching hammers chasing him.
cheers

__________________
And if you're taking your girlfriend out tonight,
You better park the car well out of sight.
'Cause if they catch you in the back seat,
Trying to pick her lock,
They're gonna send you back to Mother,
In a cardboard box.