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

Context: So , while outside the other day , I thought that I had free roam of the grounds , but all of a sudden , this little imp popped up . I wonder if I can make him a minion of mine ? We must see . Hmmm , I think he want 's to take my head off .

Answer:

They saw an imp .



What caused surprise in the narrator on the grounds ?