Factory we do alot of work in had an injury today to a person in upper management from another plant. Caught his toe on top step on set of stairs busted his leg in two places, screwed up the knee on the other leg. Now im not sure how all this actually happened, but the top step is 3/4" higher than all the other steps. Stairs are now red flagged, no ones aloud to use them and they have to be replaced to within 1/8" variance. Maybe i look at things different, ive walked up these stairs many times and never even had a bit of trouble.