Ok, here's the deal. In the backyard is a cement wall. The human probably calls it stucco or something fancy, but it's a wall, ok?
About six inches below the top of the wall is a narrow ledge. Supposed to be decorative, I guess, but I've noticed it's become a mouse highway.
This morning, I was just hanging in the yard, grubbing around for a snack when I noticed one of the squirrels jumping from the palm tree to the top of the wall. At the same time, out pops a mouse from a hole in the wall onto the ledge, just below the squirrel.
Now, I don't know if they had this planned, or it was just a magnificent example of syncronicity, but there they were, poised to run the length of the wall. In seconds, the race was on.