Looks like they started filming after some of the rockfall had already happened. Very interesting that it must have come down in at least 3 distinct portions. Yikes.
I think he heard the initial tinkling of small rockfalls and knew that a big one was coming. he works at the slate museum so is probably knowledgeable enough to know what those few small rocks coming down meant.
Podcast Factor Two - S2 Ep.3: Rick Allen - Clouds Come and Go
News IFSC Boulder World Cup Salt Lake City 2024 - Report
After the IFSC World Cup season kicked off at the new location of Keqiao last month, the second comp of the season saw the athletes returning to a familiar venue, the home of US competition climbing - Salt Lake City.