gzipped_tar (1151931) writes "Fans at a recent right-wing extremist rock festival in Germany thought they were getting free T-shirts that reflected their nationalistic worldview. But after the garment's first wash they discovered otherwise. The original image rinsed away to reveal a hidden message from an activist group. It reads: "If your T-shirt can do it, so can you. We'll help to free you from right-wing extremism."" Link to Original Source
Quantum Mechanics is a lovely introduction to Hilbert Spaces!
-- Overheard at last year's Archimedeans' Garden Party