In writing, a try/fail cycle is the main character's attempt to resolve the story's problem. There are at least three try/fail cycles in every well-written story (of this structure). Often the main character will fail the first two cycles, but not always. In Interstellar, the first try/fail is the first planet they visit, the second try/fail is the second planet they visit, and the third try/fail is the black hole.
A good writer wants each try/fail cycle to be bigger or better than the previous one. That's one key to writing a successful story. Escalate. Escalate. Escalate. The writer has got to keep increasing the tension, the stakes, and the costs.
Like I said last time, Interstellar has huge stakes and costs, and the Nolans ramp them up to the max-- all at the first planet they visit, the first try/fail cycle! Most writers wouldn't be able to do that. Do you know why?