This is a picture of Faith from the game Mirrors Edge (DICE / EA) I drew with chalk (and water).

Yes, this has many problems, but its my actual first picture I drew on the ground, and its too late to go back and make corrections because its probably smeared and ruined by now. I worked pretty hard the day I made this, it was a VERY hot day...

P.S.: For anyone of you wondering what I mean by "and water", what I did was spray a spot on the ground then drew on that spot, repeating till I was done with the picture, which makes it last longer.