Furtive Glance

We headed back from the Mendips today, driving in and out of torrential rain for most of the trip.  We needed to go into the local town and I popped into the supermarket to get a prescription.

I was going to bemoan the modern design of these buildings, with their ramped escalators and no accessible steps to climb to the sales floor.  They have alarmed the only stairwell; I'm assuming to prevent a quick escape for shoplifters!  They certainly couldn't get away quickly on these ramps.  I was stuck behind a lady who had placed her trolley right in the middle of the ramp, preventing people passing.  Gosh, these ramps move slowly!

It's only now as I post the image that I noticed the furtive glance from the guy coming down the ramp, probably looking at the lady with her trolley.  I wonder what had caused hime to look in this way?