Due to a senior moment, my cobra trailer became unhooked as I was
pulling it out of my back yard. The emergency trailer brake activated
and broke the safety chain I had installed as well as the trailer
wiring, fortunately all this happened at a very slow speed before I got
on the road and it was no big deal to repair.

I had not realized that if you are going to use a safety chain it
should be shorter than the cable which activates the emergency trailer
brake. Probably everyone knows this but I thought I would pass this
along.

The other bit of knowledge I wish I would have known before my first
towing trip is to remove or somehow secure the front wheel as it can
loosen and drop down to the road surface.