Captain Underpants Madlibs

One day in Science class, Mr. javascript:return(false); accidentally spilled some javascript:return(false); on a pile of javascript:return(false);. Suddenly, the pile morphed into a/an javascript:return(false); javascript:return(false); that ate all the javascript:return(false);. "Help!" cried javascript:return(false);. Instantly, Captain Underpants seemed to javascript:return(false); through the wall. He grabbed a javascript:return(false); and javascript:return(false); the monster on its  [BODY PART]. "Ouch!" said the monster.