If a tsunami hits your helicopter while you are jackhammering, it will drift out to sea. What were you doing with a jackhammer at a time like this? Now your helicopter is drifting away!
As it drifts away you shout, "Heyooo! (ひょう)." You know the helicopter probably can't hear you (or understand you) but maybe it will turn on and stop drifting away if you shout it enough.
Currently there are no similar looking kanji which exist in the WaniKani learning system