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

Context: This morning started out innocently enough , except it took all of thirty seconds of me sitting at my desk before I felt something fall onto my head . I leaned forward and sort of shook my head and some gigantic ( well , moderately sized , but given the hour and the circumstance ... ) bug fell off my head and onto my keyboard . It did n't move . Was it alive ?

Answer:

Because something fell on my head .



Why did I feel something fall onto my head ?