My Favourite Blockhead

I've seen a few of these 'Emoticons' (I like calling them Blockheads) around Glasgow but this is always my favourite because its the first one I saw! Hidden under the office block which spans the M8 at Sauchiehall Street. I wonder how many people spot it while waiting at the traffic lights.

They were designed by graffiti artist Peter Drew with the others being part of his Hamlet series (more info here)