I like practicing drawing different faces with varying expressions and sometimes the page turns into a congealed mass where everyone is held together because of their proximity to each other (like when two drops of water suddenly connect).
I think my fave here would have to be the lady with glasses next to the dog. She's thinking: "Did he just say something?"
The guy with the 5:00 shadow is saying: "No no, I just couldn't find my razor this morning. Or yesterday."