how bout: to run with me, you have to be quick, to beat me, you have to be kidding
or: the cross country runner:
a running machine that glides over mud and crud
train hard!
be tough!
think big!
run cross.
or: Every morning in Africa, a gazelle wakes up. It knows it must outrun the fastest lion to survive.
Every morning in Africa, a lion wakes up. It knows it must outrun the slowest gazelle or it will starve.
It doesn't matter if you're a lion or a gazelle, when the sun comes up, you'd better be running.