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

Context: still bitchy , internally grumbling about woman in my row using empty seat as bag storage . hoped she 'd be verbally bitchslapped by flight attendants , but no luck . ate dinner / snack , which was surprisingly good for airline food . tried to stay awake by reading and doing sudoku , but became twitchy and very sleepy .

Answer:

Usually food on airlines is bad because they do n't have open flames to cook on .



Why is good airline food surpising ?