Well,different people may answer differently,yet,in most cases,people often feel surprised at the time it took place,and take a while to accept it,then they may be happy for that the "pie" falling on his head.
Ermm,surely it's important,as it bring us happiness sometimes,and,above all,it brings our lives changes which we expect the most.THink about it,Nobody could bear the monotonous life,which no interesting changes are there.
Words mentioned above are my own opinion,hope could be a help~