Probably on his way back from getting a Roadworthy signed off for the trailer, might have been the same people who passed the brakes on my trailer.
I had the boat in for a service a few months ago, and they charged for brake pads + labour.
Fast forward to Australia Day long weekend when the trailer keep pushing the truck as I was slowing down fast behind an ELGAS truck that had just been cut off on a round about - stopped 50cm of back of him.
Note that did identify a wheel bearing that had to be changed, guess they didn't look at the pads through.
They claim they did, and the mechanic made a note to say they'll need to be replaced on the next service.
Due check your eyes, when I pulled the out I found this:-
This was the good set of pads (on the side where the bearing was replaced):-
Given how hard it was undoing this - it clearly hadn't seen a spanner for a while!
Love living in an Apartment!