Having a closer look it does look like Andy Pandy as the other loose horse. Those loose horses must have wondered what that roar from the crowd was as they preceded Rummy from the last.
I still believe Rummy could have won a 4th National at the age of 13.
When you think he beat The Pilgarlic by 39 lengths the previous year giving him 18lbs.
The Pilgarlic was then only beaten by 3 lengths in 1978.
Perhaps fate saved Rummy in 1978 from not going lame during the race.