what is their nature as far as human contact?

Unlike tigers, North American mountain lions are not disposed to become man-eaters. They prey almost exclusively on deer and there are plenty of deer for them to prey on.

Lion attacks on humans are rare. Heck, even just sightings of the big cats by humans are rare; attacks are almost non-exixtant. Small children left unattended are most at risk, just because they are such easy prey. This happens once in a blue moon, or even less often than that.

When adults are attacked it is very frequently by juvenile cats who are not accomplished hunters, yet. Adults who are attacked usually are successful at fighting off the attack, although not until the cat has inflicted some severe damage. The victims usually survive.

If you see a mountain lion and feel threatened, the advice by experts is to stand up, wave your arms, look big and aggressive, and yell at it. Grab a rock or a club if you can. Act mean and fearless. This works in your favor 99.9% of the time.