What are 4 examples of foreshadowing in "A Sound of Thunder"?

Foreshadowing occurs in a story when an author hints or suggests what might happen later in the story. Four examples of foreshadowing in Bradbury's "A Sound of Thunder" are as follows:
First, the official behind the desk at the Time Safari tells Eckels that "'We guarantee nothing,'" foreshadowing or hinting that events might go very, very wrong.
Second, when Eckels accuses the official behind the desk of trying to scare him about time travel, the man says:

"We don't want anyone going who'll panic at the first shot."

This foreshadows Eckels' panic on the safari.
Third, when characters in a short story stop to have a conversation about the wrong man luckily not being elected president, this hints or foreshadows that circumstances might change in an ominous way due to the trip to the past. We are set up for a return in which Deutscher is the president.
Finally, Travis's repeated warnings to "'Stay on the Path. Never step off!'" foreshadow exactly what will go wrong when Eckels panics.
In this first part of the story, Bradbury creates suspense and unease by emphasizing how careful one must be while time-traveling so as not to change the course of history, leading us to worry that history will be changed in a terrible way on this safari.