A friend's daughter asked for a piece of honeycomb for her birthday so we went digging through one of the hives looking for a suitable comb. It turned out to be a lucky coincidence, because one of the combs had broken off of its frame and was propped up against two other combs. Sometimes that happens in the heat of the summer when the wax is soft and the honey is coming in heavy. The bees will fix the problem, but will often attach a bunch of combs together, making it difficult for the beekeeper to do regular inspections.
In this case we were able to cut out a piece of comb and neaten up the hive so that the bees can continue making straight combs and my friend's daughter can get a taste of comb honey on her birthday.