Several times when we have been at Disney World, I have noticed an airplane sky writing.
This picture was taken from the walkway to our room at Pop Century.
Written at the top of the hotel across the way are the words “PET ROCK” and “BICENTENNAIL.” You can also see part of the word “DUNCAN” for the yo-yo shaped stairwell in our unit.
In the sky above them are the words on the other stack of rooms one can read,
Click to enlarge the image.