The man thinks that Kanpei is a bandit because Kanpei has a gun, and he shoos him off saying, "I will not be deceived by such a trick (a trick to put a person off guard by speaking to him light-heartedly), go away."
しかし、男は銃を所持している勘平を山賊だと思い込み、「俺はその手（軽く話しかけておいて、油断させる手口）は食わない、あっちに行け」と追いやる。