Based on the context and the answer, generate a question. 

Context: SooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooI just got checked in here in NYC . I am so bloody fucking totally wiped out . I only got 2 hours sleep last night . And had to fly last minute across the country .

Answer:

They are unable to sleep on planes .



What may be the reason for them not getting enough sleep ?