River Hill fall was a competition in the USA . It was probably the most famous competition ever!
This is what happened:
1) Collin Burns (the world record holder at that time with a time of 5.25) does a 5.21 second solve but it turns out it was a miss scramble.
2) Keaton Ellis breaks a world record with a time of 5.09!!!!!!
3) Lucas Etter breaks the world record with a time of 4.90!!!!!! people thought no one could get sub 5!!!