長於

长 = 乛 + 丆 + 丿 : Charlie Chaplin sped into the anglepod riding his longboard, but in the kitchen he doesn't know how to stop. He manages to make a u-turn by hooking him to the pole of a wind wheel with a sickle, but after the turn he can't help but bump into a giant banana.

长 = 乛 + 丆 + 丿 : The chief (长) is asking James II of England (zh) for help, because his wind wheel (丆) in the anglepod's living room (丆) isn't performing very well. After finding out that there's too much friction, James II of England uses a sickle (乛) to cut open a banana (丿) and uses the pulp to grease the wind wheel and enhance (长) its performance.

于 = 亅 + 二 : Mnemonic symbol: prepositions (in, at, on, to, ...) are what glue the sentence together. Honey is as sticky as glue, so I'll represent 于 by a honey jar.

Yu the Great (于) was assigned to repair the electronics of the space station's kitchen (Ø2), but instead he was snacking honey from a honey jar (于). Unfortunately his capacitor (二) got stuck in the honey and now he has to use a crowbar (亅) to lever it out.