I have NO idea why I've never done this before today, but today I did. Background - For SD, I practice at 5, 7, 10 yards, or 30 feet max. I do shoot at times up to 15 yards but not as often. So today, I'm following the Mrs. around a store or two. I'm used to looking about to see who's where and if they may be carrying, where trouble might be, cover opportunities, and all that. It's good practice and makes the time go faster. Then for no reason I can think of, while walking I count off 10 paces, or about 30 feet. THEN I turn around to see where I came from. HOLY CRAP! That's close!!!! Then I mark off another 15 paces from new starting point. Yikes, that close too. For the rest of my visits to retail he** today, I count off 10, THEN look for cover and potential escape routes, etc. I am AMAZED how close 10-15 yards is, and it leaves you just about NO time to react in a defensive manner (i.e. take cover, run, etc.) - and unless you're prepared and quick, you'd having trouble drawing unless you had lots of practice. So - that's my personal ah-ha for today. Try it sometime. Stop, count off 10 in any direction and see where you are standing. I couldn't believe it. This is all the more reason to get into the habit of looking out for opportunities, etc. to get into trouble BEFORE it finds you. You just don't have the time to react and if you're practicing like me, there may be some outages. I need to go do some thinking about this. Other thoughts are welcome.