I like doing these little bags of coffee.
I wasn't out on the street, so I couldn't look at the manhole cover as I drew. I had to just sort of pull stuff from memory.
Both of the shade-tree mechanic drawings here are just drawn from memory/imagination. (Which accounts, I think, for the second mechanic below seeming too large for his car.)
Based on another anatomy lesson in the book.
Just a little contained mess