David Harris talks about his older brother drowning at the age of four in 1963. He says it occurred "right after President Kennedy was assassinated I believe. Sometime right after that. During the summer". However Kennedy was killed in the third week of November, well after summer.
Several times a "revolver" is shown being fired, but the cylinder remains stationary.
At 1:24:48 -the spinning tire throws mud onto the bottom of the camera lens.