This is one reason I really liked my Dynamics professor. On the first day of class, he wrote “F=ma” on the white board and said, “See that equation? It hasn’t changed much in the last 200 years. You don’t need to buy the newest edition of the textbook; it’s mostly just fixing errata. The lessons are virtually the same as the first edition.”

One time when I was much younger, I borrowed a trailer from a buddy to haul around some stuff that wouldn’t fit in my Jeep.

When I initially borrowed it, my friend set up the hitch and locked it in place. I figured I’d be able to do the same when it came time to return it.

Well, I didn’t do it right. I got on the road to return the trailer to my friend, and about 1000ft down the road, the trailer popped right off the hitch and started barreling down the road behind me toward a car.

The car stopped before the trailer hit it. A guy got out, grabbed the trailer, pulled it up to my Jeep before I could even say anything, and hitched it properly while I was apologizing.

He just said, “No worries” and went on his way. What a cool guy.

This happened to me one time like 15 years ago. I was sitting on a bench and a pay phone next to me started ringing. I picked it up and the local police department was on the other end.

They said they’d gotten a 911 call from this number. I said this was a pay phone and they were like, “Oh. Are there like, any kids or teenagers around?”

I looked around. There was a big group of teenagers maybe 30ft from where I was sitting. “Yep, there’s a few nearby.”

They said, “It was probably them. But we’re gonna send someone by just to make sure everything’s okay.”

A few minutes later a cop came by and asked if I was the person they spoke to on the phone. “Yep.” He looked around and verified there was no emergency and then left.

Depends on the individual. Some people will be hospitable regardless of your skin color, but will be less hospitable based on your religion, gender, sexuality, or any number of other factors.