What does it mean “to pull a Charlie Gordon”?

At the beginning of the story Flowers for Algernon, Charlie Gordon was introduced as a mental retarded or a mental disability, basically the author was trying to describe Charlie was really feeble-minded. His companies treated him like their own entertainment from asking him to do silly things, like showing the girls how to mop the toilet, dance with Ellen…etc. He really thought his friends were nice to him, so after all he tried to satisfy their desires but didn’t know that he was also fooling himself in public. Those actions of him eventually cause him bringing along a line “to pull a Charlie Gordon”, in the story means that to perform idiotic like Charlie.  

“To pull a Charlie Gordon” certainly being used quite a bit at the start of part I and was stopped immediately just when Charlie started to recover his mind. One of the examples that accidently set of the definition of “to pull a Charlie Gordon” that was when people said “Hey look at Joe or Frank or George, he really Pulled a Charlie Gordon” (progress report March 25^th), which was explained as Joe, Frank or George were acting foolish like Charlie. Even through Charlie heard it, still, he did not recognize it, and despite that fact, Charlie laughed along with the companies of him because he considered it was happiness. 

 “To pull a Charlie Gordon”, actually was built up to be an insult that illustrates how everybody thought of Charlie was incredibly stupid, a "mock-able toy" of them or either the thoughtless of him. That was proven through the quote Amos Borg said to Ernie about his fault of losing a package: “What are you trying to be a Charlie Gordon” (progress report March 25^th). Definitely there are much more insults that referred to the quote "to pull a Charlie Gordon" that his companies used to teas him, and somehow it developed Charlie Gordon a feeling that helped him to discovered the truth characteristic of his friends and be able to indentify what is good and bad for him. Still, just right after he realized that, his world suddenly being isolated, his friends were losing, day by day… and soon he felt so lonely.