Here's a subtle one pointed out by my old friend, musician and historian, Stuart Frank.

In the song "Brave Wolfe" about the death of General James Wolfe at the battle of Quebec:

If you recall the story, Wolfe and his troops scaled a cliff along the St Lawrence River to battle the French on the Plains of Abraham.

The lyrics read:

The drums did loudly beat and the colours flying
The purple dawn did stream and men lay dying
And shot from off his horse fell that brave hero
We'll long lament his loss in tears of sorrow

Stuart asks, "Who carried his horse up that cliff?"