Old sketch

Came across this old sketch while clearing out piles of stuff today. I brightened it up in Photoshop but it was ballpoint pen on cheap yellowed sketch paper. It was probably 1995 and the spur of the moment. All I had was a ballpoint pen and a cheap sketch pad. Or lined notebook paper. I chose cheap sketch pad. There was a time when made sketches like this by the dozens. Thinking about doing that again. When I was in high school I would go to the Houston zoo and sit by the entrance and sketch people as they came into the zoo.  Wonder what ever happened to those??