A little over a year ago, my wife and I flew from Nashville to Detroit, picked up our rental car and headed out to Toronto. When we got to the border, we handed the agent our passports, and kept our mouths shut. Then he asked us why we were coming into Canada, and how long we'd be there. So I told him the truth...we were driving to Toronto to attend the Electric Light Orchestra concert, and then would turn around and head back to Detroit. I thought he'd at least crack a smile, but he never did. We got through, and had a great time. On our return to Detroit, we crossed the border around 4 a.m. The U.S. agent asked us why we were coming through so late...and so again, I told him the truth. He thought it was pretty cool that a couple of old farts had driven to Toronto to see an ELO concert.
About ten years ago, on a business trip, four of us flew to Bangor, then headed to New Brunswick. One of my co-workers was Israeli, and a former member of Mossad. We spent over an hour getting grilled and having our car searched from head to toe. On the return to the United States, we spent all of a minute getting through.