Passengers started clapping as a 7-year-old Arizona boy and his parents were escorted off an Allegiant airplane.
Jorge Aldarado says his son Giovanni broke out in hives while boarding.
The flight attendant tried moving them away from a dog, which was causing the problem, but it didn't help and the flight was delayed.
The little boy burst into tears as passengers applauded their exit, rather than offer any sympathy.
Allegiant Air apologized to the family for the negative experience.
Passengers applaud after boy breaks out in hives, forced to leave plane