Sorry for asking here, but does anybody know of a web page where you get to see someone's drawing and then you write a caption for it, then someone else will ha

Sorry for asking here, but does anybody know of a web page where you get to see someone's drawing and then you write a caption for it, then someone else will have the caption open on their monitor and they get to draw it, and on and on? It was fun! Then I lost the URL...