If the link copies here, this video shows the rescue of two small children from a car that had been turned upside down in water during the recent storms in Texas.
One of the people trying to save the children calls repeatedly for somebody to give him a knife.
I would have thought that every one of those Texans would have a knife in his pocket! Why not two? And maybe something on the belt as well.
Just another reminder to keep a sharp edge at hand.