[Person #1]: And you think this will work?
[Person #2]: We have the highest expectations of success.
[Person #1]: Highest expectations?
[Person #2]: Reasonable certainty.
[Person #1]: Reasonable certainty?
[Person #2]: Mild confidence.
[Person #1]: Mild confidence?
[Person #2]: We are drawing lots from a bowl of angry scorpions while ice skating downhill.
[Person #3]: YEAH! WHO'S WITH ME BABY? -- RecklessPrudence
Many a life-threatening adventure has both started and ended with the words, "The human has a plan." Many more have had, "I think I have an idea," as their epitaph. But for the most part, adventures that contain these words of doom can be survivable. Those who survive them often never want to adventure for the rest of their lives, but they survive and make a healthy living off their memoirs.
After a time, those species willing to have a human as part of their crew have evolved algorithms for ascertaining the survivability quotient of their human. Phrases like, "I've seen this in a vid," are definite indicators that the human in question may not be as reliable as one who uses, "I've done this before."
But in the case of the Grebnak Incident, the hare-brained scheme actually came from the Grebnaki Second-technician Dalyst'r, who formulated a plan that involved explosives, a counterweight, three long poles, a lot of ductape, and a rubber duck.