谢世

谢 = 射 + 讠 : Marie Curie (xi) just came back from her trip to outer space and is standing in front of the launch pad (射) in the elevator's bathroom (e4). She thanks (谢) her sponsors and points towards the sponsors' advertising column (讠), saying that it would have been impossible to go to outer space without their funding.

世 = 廿 + L : Mnemonic symbol: the WTO or WHO.

Sherlock Holmes (sh) is cleaning a flower pot (廿) under the shower of the space station's bathroom (Ø4) with a loofah (L) because he didn't quite understand a poster next to the shower from the WHO (世) explaining dangers arising from different germs.

In this case, L is for loofah.