"[b]Well, aren't you a fiesty little thing.[/b]" 
Alex morphed into his shadow, and whispered "[b]Boo.[/b]" to the girl. 

Moving around the room, projecting his voice in the opposite corner he was in (while continuously moving) he kept saying "[b]Boo[/b]" over and over again. 
He finally walked out of the darkness, and smiled widely.