What are 5 major events in a sound of thunder?

1. Time Safari, Inc. is a company that offers big-game hunters the chance to travel back in time and hunt dinosaurs.

2. Travis, the main character, is a hunter who is selected to go on a hunt for a Tyrannosaurus Rex.

3. The hunters are accompanied by a guide named Eckels, who warns them to stay on the path and not to touch anything.

4. Travis accidentally steps on a butterfly, which creates a ripple effect that changes the future.

5. The hunters return to the present and find that the world is very different from the one they left.