I have fond memories of my childhood watching video from the lunar landings. One in particular is embedded in my memory and I was happy -- but not really surprised -- to find the footage on YouTube.
Dave Scott of Apollo 15 decided to test Galileo's observations about gravity on the moon by dropping a falcon feather and a hammer together to see if they would land at the same time. I don't want to spoil it for you, so go watch.
To me this has always been what gravity is about, so my representation of this force could only have been a falcon feather and a hammer.