These drawings done over the years are all done from observation in various airports. They take anywhere from 1 minute to 10 minutes.
Phoenix Airport
2015
Brown color pencil and graphite
8.5" x 11"
This man had no problem taking up 4 seats while other passengers had no where to sit in the terminal. Sleep in vacated terminals, but to sleep in the one that is going to get full for boarding is just really rude.