Here is Travis Kauffman, who recently fought off and killed a mountain lion that attacked him while trail-running in the foothills west of Fort Collins, Colorado.
The size of the lion, once announced as 80 pounds, has now shrunk to 40–50 pounds. A yearling, probably.
Gossip abounds. For instance, one source pretty well plugged into the state's mountain lion network (of humans, that is), claimed that he actually was shooting a video of the lion when it attacked him. That is why the attack came from the front, she said.
True, when hunting deer, lions generally attack from the side or year and bite the prey's windpipe. This lion, probably young and inexperienced, fastened onto Kauffman's wrist.
But given that he outweighed it by 100 pounds and was angry to boot, you can see how he could subdue and kill it, although he got some significant lacerations that will leave him with some scars.
(Unrelated: Travis is purely American name, as Nigel is British/West Indian. Do all Travises have Texas roots, a memory of the ill-fated William B. Travis at the Alamo?)