A popular Gumby catchphrase is "My brain hurts!" which was used in the Brain Surgery sketch. This is also heard in the trailer for Monty Python and the Holy Grail, when the crew is supposedly "looking" for someone to voice the trailer. Whilst playing a clip of Arthur knighting a peasant, (which, actually, never made it into the final film) a Gumby (as being voiced by Michael Palin) auditions, and after being told to "Go away!" by the casting director (voiced by Eric Idle), he comments, "What's wrong with my voice? My voice is fine, it's my brain that hurts...". Other recurring Gumby elements are a violent and oafish clumsiness, and enthusiasm for banging bricks together.