The t-shirt reports a quote from the movie The Princess Bride, although flight attendants did not find the quote funny and asked Mr. Mullins to take it off.
This is what Mr.Mullins said: ‘The flight attendant said to me: “Are you able to remove it because some of the passengers are quite intimidated by it. I thought it was all a bit silly. The person next to me was laughing, because they knew the movie. I wouldn’t be surprised if they had someone watching me the whole time,’ he added. The whole experience was a bit over the top, but also a bit comical.’