You could take a bike and chain it to a tree, an old bike.
You could have 2 rental cars.
You could have a friend drive from one location to another.
You could have a friend cross the mat with the chip on, wearing no number, and then give it to you to cross the next mat.
There are only so many ways that you can get from one mat to another and cross it.
Help from a friend who would never talk.
An old bike that you ride to checkpoint area, lock it up or lean it by a tree, cross the mat while walking and looking back (head down) or actually running across the mat, get off, go unlock your bike and do it again. Not hard.
Many people bike around and he wouldn't get a second look from anyone, as again he has no number exposed. Look at the picture for proof. He's walking along the course...can you people really not figure out why?
REMEMBER THIS, your number is hidden, so no one is going to yell at you as they believe that you don't have a chip because no number exposed, hence you aren't activating anything. Think about it.
The back roads at Boston that run parallel to the course are faster on a bike than a 6:50 mile pace...I've biked parts of it, you just have to know where you're going.
Oscar WAS right from the beginning, but too many people want to know exactly how he did it, as in which method. Sorry, as for me, I know it's one of the above and that's enough to satisfy me.