When Harry enters the hospital room, he raises the head of the bed to about 45 degrees, and one can hear the bed's motor working. In the next shot of the bed a few seconds later, the head is much lower and the motor has not been heard in the meantime.
When Benson enters Dr. Ross's home, he takes the downstairs phone off the hook in order to prevent her from calling for help from her upstairs phone. However, that would only work for rotary dial phones, which call out by interrupting the circuit in rapid pulses created by the turning dial. A phone off the hook keeps the circuit intact, preventing such interruptions. However both phones are touch-tone, whose signal is unaffected by another phone on the line being off-hook. So Dr. Ross would be able to dial out regardless.
At the cemetery, the usual mechanism for lowering the coffin into the grave is missing. There aren't even any straps in place to lower it manually.