Commoners and Emperors

Hello. New here.

Have very specific question, maybe difficult, do not know, but what was behavior and how commoners acted when they met Roman Emperors? (to make it more narrow, lets say during Macedonian dynasty era, and/or generally High Middle Ages)

Like if Emperor went to streets of Constantinople, or made some progress to other cities or villages, how people acted? Does we have some sources or informations about this?

Thank you.