Not a “misunderstanding”, just a pathetic attempt at extortion by one of life’s losers.
I should have put the sarcasm tag on that one...it did need it, I think.
I noticed in the video that the hoaxer actually made an overt effort to not look at the cake box as he put it on the counter and picked it back up.
That struck me as strange behavior, as most people would have their eyes on the product the whole time.
Carrying around a personalized cake is a bit more personal than carrying around a head of cabbage, for example.