Kind of, I visited the Mammoth caves in Kentucky. They had lighting though, except for a few minutes when they turned them off to give people the experience of what the caves were actually like. Yes, pitch black.
Yeah a few. Worst one was a 5 car pile up on the motorway when I was pregnant, so surprised my daughter wasn't hurt, I had a seat belt shape bruise across my abdomen. The driver who caused it was knob. Then saw another accident while waiting for assistance from rubber neckers.