呕气

呕 = 区 + 口 : Albert Einstein meets an alien from Area 51 in the outhouse. He wants to be nice and gives him mandarins, but since mandarins aren't alien food, he has to vomit.

Mnemonic symbol: a balloon. The Queen of Hearts is disappointed by her balloons. She expected them to float upwards, but in the space station's bathroom, They float randomly in all directions.