Two years ago. My hanger snapped while riding up the Gap and, while I didn’t take out the rear wheel spokes or mangle the mech, the chain was so tangled I had to split it to straighten it out – but of course, I absolutely could not get the quick link to part.
After breaking the chain with the chain breaker, I sorted it out and rejoined it with another quick link, after also attaching the spare hanger I had. I now carry those tyre levers that double up as chain pliers…..and a chainbreaker tool.