How many miles can you go in an hour?

I'm a little reluctant to post this, as it may be one of those viral videos that gets passed around.  But I thought this girl was hilarious, demonstrating her ignorance of what "miles per hour" actually represents.  Her point of reference is her running pace--she says she runs 7 minute miles when she's in shape.  She could beat me.  I wonder how she feels about her husband posting this. . . .