討價還價

讨 = 寸 + 讠 : Tecumseh (t) is asking (讨) an advertising column (讠) inside of the aorta (ao3) for a little snack, and indeed, the column ejects some chocolate bars, which causes Tecumseh to thumb up (寸) at it.

价 = 亻 + 介 : Joan of Arc (ji) and Rosa Luxemburg (亻) are plotting their escape from the ashram in the bathroom (a4). They plan to use the ashram's rocket (介), but unfortunately, the price (价) for rockets is sky-high.

还 = 不 + 辶 : Hamlet sees an early exhibit of king Leonidas' gladiator sandals in the airplane's kitchen. However, the exhibition is still not set up but in the progress of being set up, so there's a big sign showing that it's forbidden to touch the sandals.