Once, in the Siskiyou I-5 pass, we had to stop for a jackknifed truck. Had chains on the VW, and no trouble getting going again.
Not so for a guy in another VW, who could not get it through his head why I couldn't let him use ONE of my chains, and we both go!
Trying to explain to him how a non-locking differential works was like trying to teach differential equations to a monkey. LOL
This is why I also carry a tow strap with me.
That made me laugh.