Eckels decides to follow through with his idea of hunting down a T - Rex. Company agent warns him before he enters the time machine.
Travis warns him about the rules of time travelling and how he shouldn't even step on a small butterfly as it could have an effect on the whole hereditary tree of the creature and can affect the ecosystem.
Travis helps Eckels hunt down the T-Rex but Eckels gets scared.
Eccles steps on a butterfly accidentally while running away from the T-Rex.
Travis ensures whether Eckels took the right path and followed the rules and prevented hurting any creature or changing the outcome of any event other than the T-Rex hunt.
They return back to 2055 but Travis shoots Eckels and kills him as didn't obey the rules of time travelling back.
-Eckel: I'd like to hunt down a T-Rex from millions of years ago?-Company agent: Just to warn you we don't ensure your safety.
Travis: Don't touch anything! don't go off the path or else you will experience the butterfly effect.
TIME MACHINE 2055 to Sixty million two thousand and fifty five years ago
I should escape. I can't fight it.
No!!!! I stepped on the damn butterfly
Eckel: My confidence has been shattered by the ferocity of that T-Rex
Travis: Did you kill anything, cause if you did time will hunt you down?Eckels: Not at all. Not a single small creature! *Lying*
TIME MACHINE Back to 2055
Eckel: I have made a mistake which has costed me my life!Travis: I am sorry my friend, but you didn't value the rules of time travelling!