Stairs

Was walking a flight of stairs today. As you do. And all of a sudden I was thinking how people with big feet walk in stairs. I have relatively small feet, size 37, and I can put my whole foot on the step. Of course I have to watch where I'm going so I don't miscalculate and trip, but you know, it's a fairly common activity. How do people with big feet walk in stairs? Do they twist their feet to the side in order to fit on the step, or do they just put the front of the foot on the step? It's a mystery...