The first time we did the Dumb Run, we were standing at one of the interminable roundabouts in Cumbernauld trying to work out where we were, as the route directions I'd come up with had not accounted for there being even more roundabouts. We'd left Dumbarton at 8pm, getting to the Kirkhouse Inn at Strathblane in good time for last orders, but by the time we hit Cumbernauld we were in need of a coffee, and the only place likely to be able to furnish us with same was the 24 hour service station on the M80 junction. The last thing we wanted was to get lost in a maze of roundabouts, hence the need for a stop and a map consult. The only GPS we had was Munky's old Etrex, which wasn't very reliable.
As we stood there, comparing my routesheet to the OS map, scratching our heads, a small hatchback -- something like a Nissan Micra -- screeched to a stop beside us. The passenger window rolled down, and Aerosmith's Armageddon anthem "I Don't Wanna Miss A Thing" came blaring out of the window. A man who vaguely resembled a young Brian May suddenly emerged, hanging out of the window to his waist, and belted out a verse and the chorus at us, then scooted back inside and screeched off with a puff of smoking rubber.
The coffee machine was broken, by the way, and remained so until DR5, IIRC.
We had some great times on the Dumb Run. Occasionally I think about doing it again.
Sam