My father had a doctor appointment at MGH West across the street so I went for a walk while he was there.
I had to wait a while for a cell phone using muggle on BOTH routes of access so I went had had a hot dog for lunch from the vendor at the corner of the lot.
Once they were gone I made a dive for it. It is a little tough to spot at first, it has a good camouflage method. Once you know what to look for it is spotted quite easily.