I'm not sure what movie I saw, or the analogy it applied to, but "It's like winning a pie eating contest, where the prize is a whole bunch of pies" really resonated with me as the saga of entrepreneurship.
Every win comes with opportunities, which creates new problems to solve, and so on and so forth. The hard part is recognizing a win for yourself, for your team, and building upon it.
Analogies of hills (challenges) and rollercoasters (wild rides) of course apply.