I?ve never known any caver who had a ?lucky? helmet or any other piece of equipment or clothing.
However, several years ago I was walking down Showerbath Passage in County Pot when I came across a pile of rocks ? maybe a couple of feet high and extending over maybe three feet of passageway ? that certainly hadn?t been there before. I subsequently heard that there?d been a minor earthquake associated with the Dent Fault, so I supposed that that must have caused the rockfall.
Also in the Easegill System, one day I noticed what I at first took to be spent carbide strewn all over a rocky ledge near Stop Pot; closer inspection revealed that it was, in fact, powdered rock left by a new rockfall.