Sentence 1: I saw a crow above my head. 
 Sentence 3: I did my best to imitate a caw 
 Sentence 4:  The rest of the people on the patio started staring 
 Sentence 5:  Finally, one woman in the back joined in 
 Option 1: He was sitting on a branch of the tree beside me. 
 Option 2: When I looked again it was just a shadow, there was no crow.