Spongebob Ghostlypants Rides My Bike

I'm hardly an aficionado of random defacement, but I can appreciate the cleverity (not a real word - cleverity (v): the act of being clever) in this case. When Caltrans, or whoever painted a big square splotch over some graffiti on this underpass, it was artistically clever that someone envisioned it as a ghostly Spongebob, drained of all color.