Here is some useless facts from MIT to keep your mind occupied as you ascend....'everyone trips on stairs and it is calculated to occur in one in every 2,222 occasions. A resulting minor incident is calculated to occur once in every 63,000 uses whilst a painful incident is calculated to occur once in every 734,000 uses. An incident requiring hospital attention is calculated to occur once in every 3616000 uses'.
Good luck Dusty