Eyewitnesses Peter and Sue McKnespiey said they heard the moments just before the US Air Force Pave Hawk helicopter crashed.
"The noise was so loud it didn't seem quite right, Sue my wife looked out of the window... it was lighting the whole of the yard, it was just skimming the top of the house. We just heard a different sound of the engines and I said something's not right."
RAF Marham's station commander has spoken about the base's role in the investigation into last week's helicopter crash in north Norfolk.
Churches in our region have been lighting candles in memory of the American air crew killed when their helicopter crashed in Norfolk.
Last year the US Airforce published a story on the importance of helicopter training missions.