off-topic from OP I know, but...
I've had several, similar experiences at a dojo on a very busy street that had large windows close to the mat. Cars would stop for the traffic light and you'd be mid breakfall, upside down and wind up making eye contact with someone sitting in their car. It's actually a very delightful experience to be able to notice other people, their expressions and to even have a briefly exchanged, "good morning! how are you?" smile mid ukemi.
At one point we worked out at a fitness club with big glass windows facing the weight machine rooms.
Lovely ladies in work-out tights would tend to make for some very ugly landings in ukemi. Focus, FOCUS!!
The attractive twenty-something who would make eye-contact while working on the thigh machine had a particularly devastating effect on several of the younger guys. ( of course, being so much above all that I was unfazed
Fun to watch the reactions though.