[2ndgen]

You mean the ground strap?

 

[2ndgen]

It's all good. I've been in my own profession for decades and still learn new things every day.
It's when we stop learning or when we think we know it all that we have to worry...

 

[2ndgen]

"Hey I am an experienced mechanic "
"what this string thing at the back of the motor is "
I'm speechless.

Well, just because you're experienced in a field doesn't mean you've learned everything in that field. How many mechanics have never rebuilt or even opened a transmission or differential? Everything is something new to everyone at some point.
I've had silly aha moments in my own profession where I learned/discovered something that I should've probably known for years.