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 ?

Select from the following. * Because something fell on my head .. * Because I leaned forward .. * Because I shook my head .. * Because this morning started out innocently enough ..
Q: Why did I feel something fall onto my head ?
Because something fell on my head .