Karl Washes Up and Shows Some Cheek
Karl famously enjoys looking out his window while doing the washing up. Once when he was looking into his neighbour's flat he saw a woman walking around with no knickers on. Since he had a sneaky look, he thought it only fair she get some in return, and so he lowered his boxers a bit to show her a bit of cheek. His window was too high though, which necessitated his hoisting himself onto the sink a bit. He never looked to see if she saw him.