Pollard is noted for his short stature , which allowed him to play youthful roles well into his twenties . One such notable role included the teenage-leader of an all-child planet in the haunting , iconic episode " Miri " on the original '' Star Trek '' series : ... Michael J. Pollard is smarmily effective as , in essence , a cult leader for the kids , and the kids themselves manage a perfect blend of creepy , scary , and silly . The cry of “ bonk-bonk on the head ” is amusing right up until twenty kids pile onto Kirk and he emerges with blood seeping down the sides of his head . He also appeared in the memorable first season episode of Irwin Allen 's '' Lost In Space '' as a nameless Peter Pan-like boy who lives in the dimension behind all mirrors ( " The Magic Mirror " ) In 1967 , he played the supporting role of C. W. Moss in Arthur Penn 's '' Bonnie and Clyde '' , alongside Warren Beatty , Faye Dunaway , Gene Hackman , and Estelle Parsons , for which he received Academy Award and Golden Globe Award nominations for Best Supporting Actor and won a BAFTA Award for Most Promising Newcomer to Leading Film Roles . The role led to his joke candidacy in 1968 for President of the United States , complete with a campaign song : " Michael J. Pollard for President " , recorded by DJ and recording artist Jim Lowe , best known for the 1950s hit " The Green Door " . ( The record features Pollard himself , asking , " Hey , man ... president of '' what '' ... ? " and a snippet from real candidate Robert Kennedy ; Kennedy was assassinated soon after the disc came out , which led many radio stations to refuse to play it . ) Also in 1967 , Pollard played the lead role in Derek May 's short drama , '' Niagara Falls '' . Later that year , he was once again singled out for praise in Carl Reiner 's autobiographical comedy '' Enter Laughing '' ; noted film critic Roger Ebert wrote : Michael J. Pollard , an unknown before his fascinating entry in '' Bonnie and Clyde , '' brings his squint and grin to the part of Marvin , our hero 's buddy , and steals every scene . There is something about Pollard that is absolutely original and seems to strike audiences as irresistibly funny and deserving of affection . If he works at it and gets a break or two , there will be no stopping him . Really . All he needs is visibility , and people will become addicted . In 1969 , he played the supporting role of an escaped American POW , " Packy " , in the British World War II-themed comedy , '' Hannibal Brooks '' , directed by Michael Winner
assassinated
Assassination of Robert F. Kennedy
Michael J. Pollard