Coupling order

Juddian:
its when you change a routine that things go pear shaped.

Or when it gets interrupted. Having once been engaged in conversation when picking a trailer up, and forgetting to put the clip on (thankfully without incident) I now adopt a routine that starts from the beginning checking everything if for any reason I am distracted from it.

Biggest mistake you can make is to rush things; I’ve seen a highly experienced driver drop a trailer on its knees because another driver was hassling him to hurry up and he forgot to wind the legs down. Fortunately the trailer was empty and no damage was done.