Standing up to 245 feet tall and with diameters of 18 feet, the sequoia is one of the hugest trees on the planet.
And when they come down, it's best that nothing gets in their way.
Happily, no visitors were in the Trail Of 100 Giants in Sequoia National Forest, in California, when two of the towering trees fell side by side.
The Forest Service has been forced to close the trail after the downed monsters were spotted for the first time.
Officials are still working to determine the ages of the trees and why they fell.
Clearly there is no way the tourist spot can be reopened with even the remote possibility that another of the trees will come down.
A firefighter is dwarfed in pictures taken of the crash scene which show mighty root wads that are three times the size of him.
Forest Service officials said tourists can still see giant Sequoias at Freeman Creek Grove along Lloyd Meadow Road and other areas of the park.
Spot the fireman
