You don't have to be the fastest, just not the slowest.
Hikers Encounter Grizzly Bear, Promptly Run And Scream

This is a video from Glacier National Park in Montana of a group of hikers that encounter a grizzly bear, prompting them to all run in different directions screaming, which is apparently exactly what you’re NOT supposed to do, as it may “trigger a natural predator-prey attack response.” Thankfully for them, the Benny Hill routine worked, and they all survived to live another day and decide maybe watching a nature documentary at home is more in line with their outdoor survival skill sets.