This is the ordinary world were Keith has just become president and people are in the streets celebrating.
Crossing The Threshold
This would be the call to adventure because Travis says they are not guaranteed to come back alive but you are guaranteed to see dinosaurs.
This is where Eckels meets Travis, and where Travis leads him out of the office to the time machine.
Return To Ordinary World
TYME SEFARI INC.
This is where they go through the time traveling to the past and arrive on the path they talk about in the story.
This is where they meet their match with the T-Rex and it sees them and Eckels freaks out and runs off the path and and all the other guys start shooting.
This is where he returns to present time that was the same, but different at the same time. He sees the sign and asks who won the election and they say Deutscher. thats when the sound of thunder rings.
SEFARIS TU ANY YEER EN THE PAST. YU NAIM THE ANIMALL. WEE TAEKYUTHAIR. YU SHOOT ITT.