Driving to Friend and started talking about needing to get another van in a year or so.

Meaning Brad started to think about money.

Meaning Brad got distracted…

Me, as we pass the Interstate: “Are we taking the highway?”
Brad: “Oh. (Pause) I don’t know what I’m doing.”
A few miles later, I realize we’re going maybe 40 in a 60 zone…
Looking at Brad: “Good lord, just out for a Sunday drive with grandpa here.”
Brad: “Huh? (Looks at speedometer) Oh.”
Maybe we should switch spots, dear…