That one looks like he means business.
Actually, they sense the vibrations in the earth from footsteps and that's a natural defensive posture, not an agressive one. It's quite simple to just walk around them unless they are in the way. A human presence is quite overwhelming to them since our heat signature is hundreds of times larger than the rodents they prey on. They give you plenty of warning unless you both blunder into each other and even then, they would rather de-escalate the situation if possible despite all the cowboy and horror movies you grew up on.
Still, no one here wanders around outside barefoot or in sandals!
