It is because there are certain weight limits that should be followed. When the EDS would exceed the specified limit, the aircraft will crash before it reaches its destination. This was taken from the science fiction called Cold Equation. Barton is a one of the EDS pilot. During his flight, he discovered there was a stowaway girl named Marilyn, hiding in the vessels area which eventually led to their demise.
These are some ways you can finish it.
A wolf hunting for its prey.
A rock
Miss Trunchbull from Matilda
The reader sees that there is a great deal of external conflict, especially between Lennie and various people such a Curley's wife, whom he ultimately kills accidentally. George, in his trying to take care of Lennie, often intervenes in the "man vs man" conflicts because Lennie's limited abilities causes him to miss the nuances of life among groups. George does have some internal conflict, since he has to decide whether or not to kill Lennie. He makes the decision to "put him out of his misery" which has not happened yet but would be "external" if he had to face the "mob" after Curley's wife's death.
There are multiple answers in mind but this one stick out the most inside of my head