Which set does this windshield piece with a hanging green head come from? This is a windshield piece 2x 4 x 2, 4594. It has a printed green face on it. What set does it come from?
That would be
Part # 4594 : Windscreen 2 x 4 x 2 Vertical with HP Shrunken Head Pattern
from Set # 4755: Knight Bus