Back at the Fan Expo Canada here in Toronto there was a number of sketch duels with big-time rad artists. The rules of the duels were to sketch a character chosen by the audience and finish in an hour. At the end the sketches would be raffled off. So the real winners of the duels were the audience.
I attended almost all of them (missed one cuz I overslept) and kept note of the characters that were drawn. I did this because I wanted to see how I'd do drawing a character in an hour.
Both done in blue pencil because I ran out of time.