Yes Paul,
We never had CHiPs on again here after the late 70's-early 80's, no repeats, thank God!.
But if you look at that pic above of Charlie and I with the CAF Branch(nozzle), note that it is blowing lumps.
This callout was done 2 days after we took possession of the CAF appliance.
Using a standard First-Aid Hose reel, both Charlie and I would be wearing Breathing Apparatus and would be inside the car at this stage and would emerge as black as tar babies!. [Linked Image]